Interestingly I just beat 11.3 and Carla hardly got hit. I got way ahead of her, cleaned off most of the board for her, then waited for her to catch up and picked off the stragglers. Actually, 11.4 is sort of annoying, because she has a habit of running in front of me when I can happily take down a launcher in 2-3 hits from the cat spear. I kill her a lot in that level, so I usually take a speed drink, dash ahead of her, pound the launcher as it lands, then let her do whatever she's going to do. So far, "difficult" is everything but.
And oh my god, Aero Gear. Holy wow does it speed things up. I got through stages 3 through 5 in about seven minutes, including the upgraded 5.2. I don't know what my stats ought to be, but I'm running on about 750 atk/def, about 5030HP, about 230 tech and somewhere around 1200 stamina.
https://www.dropbox.com/s/z8ls3rc3f4mkb … n.txt?dl=1