So far its been really fun, So far ive managed to solo step 30 a few times and gotten some pretty solid step 30 runs with my alliance. Loot wise its really good too, While its tanked the prices of 8 slot dim you can still make some decent meseta from divides. Mostly just waiting on Grania to reset so i can make my steel weapon since im two short and the drop rates of grania on step 20-30 is pretty awful.
If your having trouble on step 30 it helps to seperate Varuna from Mitra if your playing with other players. Varuna has a weird AI quirk where he wont attack as much if hes far away from mitra. Also somthing to note is that if mitra is floating in the air with no throne and you attack her, she can grab you drain your pp and then re-gains her shield. Solo wise Etoile has a massive advantage for this fight due to having ways to fight the two pretty safely.
Also re-Supply missions can drop units With SSA including Attack up 2 which is a really nice S7 ssa
Even if your not intereted in making Stil weapons you can still get whats needed for Cras so this is very worth your time to farm, Also mitra/varuna glares are good affixes.