Well, since the kedama farming point on 30f isn't hard to reach, I think before I even really explore I'm just gonna awaken Shou, put Chen in the party for reduced running TP cost, give Shou accuracy boost gear and Monk, and slot her in the front with a strategist for 70% chance to move first. And farm them kedamas at lv700. Once my level is sufficient I can give her appraiser and an angel slime hat and stop running, but yeah.
EDIT:With all dark fragments+backrow Chen, running takes 2tp. Shou can survive the attacks and kill kedamas with only lv200 library and eh equipment, and has great tp with ethos of bodybuilding and tp boost 1~ This works great. She even kills the kedamas with Physical Counter if she doesn't proc an instant move and they decide to use Space Compression. Edit again:Okay, now that Nitori and Miko just kind've annihilate the random junk, I swapped Chen for Aya who took Byakuren's spot in front. Even better~
And then I'll save every remaining floor of the Infinite Corridor to try to get a massive chain for dust stock. How high are the enemy levels on 250f?
Is there any good way to check enemies' def and mind? By check I mean seeing which defense is easier to go through.
Well, if you use a magic attack and then a physical one it should make it fairly clear :X Unless the enemy in question has so much you struggle to deal over 1 either way, but in those cases it's generally not a big difference either way. If that's the case, the testing method is the same, but you'd need to use either buff/debuff mix or an "ignores half defense" attack (mountain breaker, dazzling gold, sword of light, awakened orin, maybe a super drill, etc) but now varying offensive power starts to become a problem, or etcetcetc.
Generally if they're both mega high it doesn't really matter, you need an extreme measure either way and whether it's atk or mag isn't important.