@Yannv Disconnects in cmode is almost entirely an item desync issue. It can be avoided by 1: not picking up items at the exact same time as another player (this leads to both players thinking they have the item, but when the one that doesnt actually have it uses it, they dc), and 2: dropping item directly on a room border (game doesn't know which room it's in, leading to d/c then or later). Avoiding those things has cut out >90% of all d/c of runs I've done since. I hope that helps you for any future runs.
2c3 is definitely kinda rng, but alot is the rushing strats (it's the ttf of cmode stages, can skip areas 16+17+18+19), basically no farming even though ep2 attributes are any stat, and a boss with small attacking window that likes to waste time. Other than 2c3 though, I've never failed a stage only due to weapons, 5/6 are slowed more due to excessive baranz/dubchic spawns rather than weapon %, and stage 9 if one gets any pallasch to drop (attribute more important than hit) then one can do fine on falz. 2c4 deldepths are also not something you use Hit% for, since you actually want to Miss Miss Hit if not using traps on them (they're reverse cave slimes, instead of 3rd hit split, they're 3rd hit stay up and do nothing). All delbiters in cmode are avoidable or rampable (I think there's < 3 you actually have to kill?), which makes them unable to hit you while you kill them freely.
You've had a pallasch drop in mines with abeast? And that sort of thing happened more than once? That... shouldn't be possible. Pallasch should only drop in 1c9, and I've never personally seen or heard of any reports of false attribute in ep1 either, nor does anything come up in forum search. If you have any more info on the incidents or can point me in the right direction I'd like to look into it, that sounds like a pretty crazy bug.
As for titles, iirc the title is the last stage you did, so if you want it to be the stage 9 title, even if you've completed cmode you can simply replay 1c9 and get that title instead (if anything, this lets people pick the title they want to have). The extremely rare 'not getting reward' bug is something we will fix for players manually since the benefit of being able to play stages out of order is an extraordinarily huge boon for cmode. For example if someone were to d/c at the end of a stage, suddenly they wouldn't be able to continue with their group normally. IMO being able to play any stage at any time is not something that should be changed if it can be avoided.
I do appreciate the feedback, and I really hope the tips to avoid d/c help. If you got some free time in this event I'd love to do some hunts (or even cmode) with ya again.