TechnexGames
I like his Rogue/Ranger/Vine monster base but he needs to throw in something else. His current souls has amazing potential but he needs something right now to charge things up. Typically rogues get access to shadow magic and Rangers get access to nature magic but aren't as skilled as druids. The vines have insane potential if they can eventually change their shape, material, and or state of matter. The Ranger could give him access to magic arrows so he becomes magic green arrow. Rogues can get more gadgets like handheld crossbows, bombs, throwing weapons, etc. But all of the magic for the souls I listed is late early to mid game stuff and everything I just said is probably late mid game stuff. Unless he throws in other souls to get those things early. Cleric could be the answer because of the versatility it brings thanks to all the patron gods. Hopefully it gives merlin actual combat magic which would give him more immediate combat options. Maybe wizard could do the same and it would be interesting for him to actually look like his namesake on the surface. Plus merlin using a magic staff as a weapon would also shake things up because F wands. Although it would be funny to see him stab people with a wand. I just think it's funny if because of his name, his eventual attire(robes, maybe a wizards hat) , and staff/wand people peg merlin as a pure caster . Then all of a sudden he pulls out knifes and takes the robe off revealing leather armor. The reactions would be priceless. It would be even funnier. If his best gear drops are always more magic based. So he is forced to look like a spell caster when he prefers mixing his spell casting with whatever weapon or weapons he is holding.