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Increase Andenaj's proc rate. It is horribly low at the moment, I can stack a francisca to full in 10 mins while andenaj is at 150/750. Also I didn't get all the stacks in ch4, despite i killed everything.
Make the stat that allows to go over the chapter's max lvl a shared stat. It is just annoying and time consuming to keep swapping Mega/Giga/Tera ring and Ring of Wisdom and grind monsters for the extra levels. For example I spent 20 minutes at the kraken boss killing the bugs and tentacles just to get those extra levels.