I am pretty sure that in the normal Survival Dungeon the monsters do not refresh if you get defeated and that you fight whatever monsters were left standing with whatever remaining health they have, so when I got blasted by two consecutive specials in the last orb node and my Talos was killed one turn before he could have taken out the remaining Faraday....

... I thought I could equip a bunch of Lvl 100s and finish the job to get those orbs, yet I was greeted by a full enemy team with full health:

... what also made me suspicious was that I was again hammered by two consecutive specials!
Ah well, did get pretty far, so happy with what I've got, but still think that this shouldn't have happened!

I lost 12 Nemesis monsters on this same node...