Unfortunately I did not have enough time to test as I would have liked. I have not yet managed to level Sulik via normal means. However I did manage to level both Sulik and Klint via exploit. If combat control for party members is turned on and combat ends while you are controlling one of the party members that party member will gain experience and, since party members are all level 0, immediately level up. This is... somewhat exploitable and not really in the spirit of the game, but it gives nice party members pretty fast. I do lose on the experience since it goes to the party member. EDIT: I managed to level up Sulik & Klint the regular way. It seems with that level-up the exploit level was overwritten. I will continue to play and report when I have more data. Good news is that party members retain their levels. I think Hubal has same issue. I do love enhancements to mod, especially highlighting items, corpses, shelves... Thank you for that.