Greetings fellow Touhou players. I found this awesome game about a month back and I haven't been able to tear myself away from it since. It's like Etrian Odyssey on crack I can't seem to get enough of it

I just recently hit the 16F wall and have been grinding away little by little. I currently have all the available characters save for
15F I can't even fight yet because I can't seem to kill Triomagen. Friggin' heal is WAY too powerful. I mean I can nuke but I can't nuke THAT hard yet... The insane amount of SPD they possesses is also pretty irritating and getting debuffs to stick via Discarder or Avaci ETC doesn't seem worth it. The general strategy I fellow is buffing everyone with 12 Generals and Thundercloud Stickleback and than nuking them as hard and fast as I can. The rest is up to luck sadly. Either that or I need to dump more skill points into Marisa/Patchy's magic stat.
isn't that much of a problem it's the knights before hand and I think I just got unlucky last time I faced her. I'm really just being lazy about it since I don't have a slot for her anyways ATM.
I can't seem to make any decent headway on because she spams Ikhasa to hell and back for some reason and that just rips my party to shreds in no time flat. Grand Stamp one shots the whole party with it's first turn. I'm thinking you're not supposed to be able to fight him right now.
Current party level is Reimu 64 with an average of roughly 60ish for most of my party and the under used or newer members bringing up the rear at 55-58. Main battle party usually consists of Reimu, Marisa, Patchy, Meiling,
and the last slot gets swapped around as needed. The members who don't leave my party for any reason are Reimu, Marisa, Patchy, Meiling,
everyone else gets swapped around based on situation. I've tried out the others fairly extensively but have opted out of using them for various reasons. Remi and Sukaya for example got benched early on somewhere after floor 9ish I think.
It's not that they're bad characters it's just they ended up not suiting my preferred style of play down the road. I mean everyone has their uses it's just there's a time and place for them.
So I'm mostly looking for advice against Triomagen so I can try my luck against 15F. Having her around would really speed up the grinding on floor 16.