Well that is one possibility... The other one is to just pick faraway target, ideally mage or ranger on some high ground position - teleportstrike to him, focus him and at the end of the turn I either knock him down with warfare, or I use chameleon to vanish, so they cant focus me (until they are busy with my other party members).

my rogue never died so far, and he is full damage dual wield still. I of course have fortify and magic shell on my other chars to help him.