Once you hit around level 50 there's little to no skills that suit your character either you're with shield mastery or two-handed damage for warrior etc...
I'd recommend simple skills that apply to every character in general and here are my thoughts; Attack speed +2% per skill point or keep it simple with a never-ending skill in general like 1% damage that can stack up forever depending on how many points you put into the skill Ex: (you levelled 30 times and put all 30 skill points into this 1% damage which would then add up to 30%)