first off… hi there, normally i linger around (lurk intensifies), but since im going mad doing 2h in the last month maybe can give my 2cent of advice XD.
well, i was going to write a text wall, but i don’t think is going to help this time, since more likely all the info are already written in other posts
btw, demo and shaman are a solid choice for increase 2h damage, either if u chose one of them has primary or secondary mastery, the reason is obv for fire strike (demo) and savagery (shaman), they add a global multiplier (to the skill only??? thinking now i didnt ever bother to check XD) which can make 2h damage skyrocket, and since is multiplicative, more high is your damage on hit, more hard they would let you hit!
(example -> Arcanist + Demo + Vortex of soul and item for convert chaos and fire damages in to aether…)
then the other mastery normally is chosen by liking or in what you wanna accomplish with X build, since every mastery have his own way to do things, just give a rapid look on gear support for X class… likely if u are gonna try to make a 2h aether damage without Arcanist… then u should search for a way to convert damage in to aether without rely on Arcanist gears
On other note, not all the damages have the same itemization, converting Chaos in to Aether is more easy, while the reverse… goodluck to achieve 100%
So once u find a mastery that is of your liking (gameplay wise) link it to Demo or Shaman and try to make on their main damage types that they offers, this way u can have a nice synergy coming from gears too (is not like having 2 damage types is a bad thing, sometime help you to clear tough foes VS a specific damage, more likely doing only aether damage against aetherials lol, for hurt them badly u need some real debuff/damage and usually gears give you dmg bonuses against them has backup…).
Still… don’t try to have to many different damages, because even if they help to show big numbers on “paper”… doing 100 physical damage has the same utility of a brick in a desert on ultimate.
Other tips… attack speed… is your friend :), and kraken devotion give you a much needed boost to it (works with range and melee, just be sure u are using 2h).
So in short… if u wanna melee, and be tough in this game… go with shaman, is a solid choice for starters :), once u get the hang of the game u can even make Warlocks that goes around facetanking in melee range killing trash with reactive procs only (why retaliation when we can have solael’s decimation XD)
hope it was of some help…