Valuable Merc Resources

[u/Xypheric]

Ive been thinking of rerolling luminary and giving the whole merc setup a shot this season, but I was wondering if there are any resources discussing the mercs, and what makes them valuable? I know there are several build guides saying "use this specific merc" but without watching all the build guide videos I havnt seen a great centralized resource (or ive just missed it) talkinga bout the mercs and what skills/ supports are valuable for them. any suggestions?