Restarting a run on LoT I finally decided I'm going all the way through this time, no cheat engine (With the exception of encounter rate for bosses to save resources), no NG+. nothing, just going through the game normally.
I finished Floor 1 no problems, Meiling got steamrolled, though Chen did give me a few headaches, she was quickly dispatched as well, floor 2 was annoying with these shadowcats, I had to pretty much hope they didn't Par-Lock my entire party. :/
My fight with Cirno was a huge gamble, at best, if she casted Diamond Blizzard even once I was royally screwed, though I got lucky with her debuffs not landing, so I made it safe and sound, took me two tries to beat her (Got PAR/SPD Debuffed way too much first try, which resulted in her ramming me with Diamond Blizzard and Perfect Freeze over and over for a game over.) and a total of four to get her item.
Youmu... Well, first try she instantly casted Focus and followed up with God Slash of Karma Wind which immediately wiped out my party with the exception of Remilia (And I wasn't even gonna try without Reimu and Patchy.), second try through though and I discovered how reliable both Sakuya's SPD Buffs and Cirno's SPD Debuffs are. By putting an all SP-Recovery items on Sakuya, I was able to cast Lunar Clock on my party about 6~7 times through the whole thing, and with Cirno's Icicle Fall, Youmu was barely attacking at all. It took forever for her to fall, but she eventually did and never casted God Slash, though she did snipe Minoriko halfway through, unfortunately. Overall an easy battle, Myon was giving me more trouble than Youmu herself, and I got her item first try, yay.
Will do 3F and beyond maybe tomorrow, but now that I get how important debuffs and buffs are in this game, I can safely say that this playthrough will be much smoother than the last.