Ok what the fuck, I just pulled Lucia's Wengine and originally I had HP mainstat Disk 6 (with a single 224 flat hp substat roll) to compensate for the lack of HP. With that disk equipped + her Wengine she had over 25k HP. Before pulling Wengine she had 22700 HP. Well I removed the disk (don't currently have another Disk 6 to use until I get more stamina to farm again) and suddenly she drops down to a pitiful 22500 HP. Even equipping another character's Disk 6 with 6% HP on it (not HP mainstat) and she only raises to 23k HP.

I have VERY good HP rolls on the other disks (only missing HP on Disk 4), got 14k+ hp from all 5 current disks combined. How the FUCK was she so severely overcapped on HP with the HP mainstat Disk 6, and without it she's so severely UNDERCAPPED? There's zero possibility Disk 4 could compensate for the missing HP (assuming I get a decent HP substat roll on Disk 6, which I want to be Energy Regen mainstat)