Dark, depending on what you have available, here's a solid deck that will win you most things. It's a dark-bug deck. Here's roughly what you want

2x dark symbol
2x vermin symbol
2x bite
2x feint attack
2x sucker punch
2x poison sting
2x fury cutter
3x crunch
3x pin missile
2x injection of pollen
2x midnight ring
4x bloody scratch
1x mosquito
3x bloody meal
4x compulsory recovery
4x honey treatment (optional)
3x enlarge sore
2x disloyal riposte (optional)
4x elixir of vitality
2x bloody panic
2x shock from terror

Bug-dark hits almost everything for neutral damage except, like, fairy.
The idea is to get Bloody Scratch ASAP, or stall till you do. Scratch, get the foe bleeding, use a bunch of low-level cards to generate blood, then use some combination of Bloody Meal, Enlarge Sore, Bloody Panic and Shock from Terror. If you have the mosquito posture, this is even more deadly, though you'll take more damage. This deck is all about murdering your opponent fast, and as such, it has another neat trick; the Injection of Pollen card will turn your foe into a grass type for a couple of turns, and if you happen to have some bug attacks in your hand at the time, let rip. If the foe is naturally resistant to dark or bug, but has a lot of blood in their hand, turn them into a grass type, then Bloody Meal for almost an instant win.

That's just one idea and it's probably my favourite.

Hey there guys. So when I was looking around, I found a few people, me included, asking about where to find decks and how to make some effective ones. So I had an idea of a dropbox folder. There is one I created where you can share decks, tips and tricks, and any other little thing cp related. I don't use gd, google drive because I haven't figured that out. So if you want in, just send me a forum private message, pm, or a skype message if you have me in your contacts. If for some odd reason you can't reach me through any of these means, try emaling me at my email below. I hope that those who join can help some of us newbies to battle and other cp players by showing some tricks and stuff.
So anyway, if you want in, provide me with your db email. Thanks.
And my email, [email protected].
I hope this folder can help those in need.

Dark water with the kraken posture can be good with phisical cards, midnight ring gives a good boost and a hig probability of critical hit, whitch is great with the tentacle level 10 card... He, I don't remember it's name in english, I play in spanish. you have to be careful with magical attacks however.
Simbols are usually used to level up faster and easier secondary type, since they give two cards of theyr type and you need 4 in hand to level the other type.
Other good option can be normal and fighting,  with phisical cards. you can change the target into normal with mutual normalization to do super efective fighting  damage, pluss fighting being able to increase phisical attack and normal have the furi swipes that can be boosted with fighting area.
Flying ghost with wind cards to use increasing wind (this one works fine being pure flying)
Fairy and normal with musical cards pluss sound wave. I takes a long time to set up but does a lot of damage.
Fighting with increasing phisical attack cards, swordsman posture, weapon taking and the prefered type, with swords. Better if that type as also shields, so you can use weapon taking and preventive thrusing to draw them. The shield gives you a great boost to weapon attacks with the pasive effect pluss helping to level up the sword type without having to change the type. The beta 66 have hidden sheat and double sheat, that makes even easier to get swords. The types with swords are fire, fairy, ghost, ice and steel.
There are a lot of examples like these to play around; make some convinationsyou can get surprised

Crazy Party beta 68 is released. It contains many bug fixes and adds new cards. I'll post the change log here.

***
beta68

Some bug fixes, the game should be playable now.
Modified cards: underground.

***
beta67

General
On a server application, you can know the general information by pressing Alt+i.
Some announcement improvements on the server applications.
On a server application, the waiting tables are now on the top of the list.
Maybe the braille works now in the menus.

Battle
Modified cards: swordSheath (withoutthe the weapon flag), snake bite (works with the basilisk posture).
Some new battle cards and some new bots.

Fixed bugs
Sometimes the game was still waiting for a player at the launching.
The game was asking for the mini-games list twice.
On the central server it wasn't possible for the spectators to watch the next battle.
The hardcore mode should be work correctly now.
The random seed was sometimes incorrectly setted.
The joker didn't work correctly.
The game shouldn't now stop when a player leaves on a server application.
The team battle with bots should now work correctly.
The classic servers are now closed after the end of the game in order to avoid some bugs on the reinitialization.
It shouldn't be possible to find gems when playing one mini-game in the reward's room in order to avoid a bug that resets the gems amount in the save.
Maybe the online board mode could work better.

Hello all.

Indeed the beta68 is available and seems playable. My apologies to those who hoped to play on the beta67 which was very buggy. Since the changes on the network features, CP is in a trouble zone. Thank you all for your encouragements and your patience.

You can download the new version on the website: http://pragmapragma.free.fr/crazy-party/

Thanks to all the contributors.

agreed, chris

So would it be possible for, when someone is kicked from a party, to have a bot take over for them? So if you were going to get lots of gems, but many people left, you could still get those gems?

Yeah, I think a co-op decks database would be fun. I definitely get what you're saying, though, especially as someone who really does suck at building decks. My problem is that there are just so many cards that I get overwhelmed, and when I begin to think about making a deck, I just start cramming everything that looks good into it, which means I end up with decks with over a hundred cards. I know it's bad, I try to curb that habit, but when I see the sheer amount of cards, my head starts spinning and the cycle just repeats itself.

Okay, here are a few general tips.

1. Keep your deck to 80 or less cards. The minimum required cards in your deck is 40, and the maximum is 80. Any amount over 80 will result in random cards being omitted, and anything below 40 will result in idleness cards which are very very bad. I recommend sticking between 40 to 60. The less cards you have, the less time you'll waste trying to find the right card.

2. Build your decks with a specific purpose.

3. Remember that you don't always have to put all 4 cards in a deck. You can put 1 or 2, which not only means you have less cards, but reduces the number of duplicates you get. You don't always need duplicates. For example, you don't need 4 posture cards and 4 environment cards, only 2 of each will suffice in most cases.

4. Pay attention to parry cards. Cards like natural mistrust are very useful for mitigating various attacks people might throw at you. I initially put that card in my decks to get rid of card thieves, but it has a surprising amount of uses. Again, you may only want to put 1 or 2 in your deck, because most of them will give you another one automatically once used.

5. Use symbols if you want to make decks with multiple types work well. Again, you only have to put 1 or 2 symbols in there, because you get an additional symbol after you play one. Remember that you lose levels in a type if you have less than 3 cards in that type in your hand, you gain levels if you have 4 or more cards, and your level does not change if you have 3 cards. Armed with this knowledge, you should be able to work out some strategies.

I didn't know about the levels decreasing if you have less than 3 cards of that type in your hand. That's helpful. However, I still can't figure out what building your decks with a specific purpose means. How can you build a deck which accounts for every eventuality?

I apologize if this has been asked but is there a way to save after battles in battle quest mode?  If not please consider adding it since it would be nice to be able to save and come back later since battles can be quite long!
Thanks for a great game!