Ok the savegame is here because is slightly larger than the maximum upload of the message :S
https://www.dropbox.com/s/nmd28sm6qnz6kpw/42e32ac35cbe4950a0ace3819639c502%209057088%20EndlessPathsofOdNuaLevel3.savegame?dl=0
I was playing in Normal but after being defeated in Oud Nua Lvl 2 by that Xaurip party a lot of times I downgraded it to Easy but had the same results.
Characters... my main (barbarian lvl 4), Eder lvl 4, Aloth lvl 4, Durance lvl 4, hired rogue lvl 3 and Kana lvl 4.
About the tactics, I normally go with barbarian, eder and kana in the front (kana shoots his ranged then changes to sword and shield), then spells from the back, rogue shoots arrows unless she can sneak to flank and attack.
I'm also considering heavily to restart the game and make another character xDD