Originally Posted by Osszy0sb
...my team is currently my warlock, Shadowheart (cleric) and Astarion (rogue), all level 3...

1) You should have 4 people. That is what things are balanced against.

2) Checkout my combat guide. https://forums.larian.com/ubbthreads.php?ubb=showflat&Number=722075#Post722075