Simplest Class Build? (Least/Shortest Combos, Simplest Gameplay Loop For Child)

What would you say is the simplest class build that is still useful and functional at endgame? Particularly the least amount of and shortest combos and simplest gameplay loop? I'm trying to find a build that a young child can play easily while slowly learning more complex combos, MP management, etc.

 

i guess two-handed weapons are generally more simple since you don't have to bother with sub-weapons and their skills. this doesn't really make the gameplay more simple, though, it just limits the options.
2h swords are pretty simple in this regard, and they look very cool.