glass prism
So I've returned after a year or 2 away and feel I really need to work on heroes for new quest area's, any advice on which I should work on first of if there's any I should consider retiring and replacing for a different build? I'm currently on void dimension at medium level difficulty
sour canyon
Not bad, honestly. Most of your heroes are decent. The main thing that stands out immediately is that a lot of your attackers are missing weapon skills. This is a really big deal. A weapon skill (think stuff like 
or 
) gives a huge bonus to the Attack stat of the equipped weapon (which already has the highest Attack stat of all equipment by a mile except for Spells). This is then further multiplied by any universal Attack bonuses you may have. These heroes all need a weapon skill pretty badly. Reroll the listed skill to get one - do NOT be picky here. Use dice, not Roland. These are all very high priority.
(will also want to swap 
for something with Attack)
These should also be rerolled, after you get a weapon skill on all the heroes above.
to basically anything
to something with Defense or HP, then to get the other stat
to something with Attack on itI would also highly recommend you check over your equipment because that tends to be a problem point for a lot of people. Check out this guide on ST Central for what you're looking for, including where to start if you need to upgrade your entire roster.
glass prism
after some rerolls, this is where i am, do the replacement skills look good?
sour canyon
has basically the same problem that her old did - it's a purely offensive skill on a primarily defensive class. Aim for something with a defensive stat on it (Def / HP / Eva). I apologize, I should have clarified this one earlier. is going to be the best skill to drop to get one. (Dropping 
is better for damage, but then you lose your only source of Evasion).Everybody else who's been changed looks good.