4th job wildhunter builds?

Here's my take on skills so far.

MMboost: Top priority skill. Max it first
Bezerk: I don't use it during training, it doesn't help too much. You would need quite a few points into it for it to be useful, but it shouldn't help your training much at all unless you boss/LHC
WaB VS Sharp Eyes: WaB I believe is better, training and bossing wise. Should provide more stable damage for faster exp
Sonic roar: bad bad bad bad bad bad bad bad bad, should be last
Stink bomb: Casts REEEEEEEEEEEEEEEEEEEEEALY slow, and can't be used at LHC. You'd get faster exp killing more monsters than the bonus it provides in that time frame

Best build imo is

120: MMboost, WaB, MMboost/explode arrows
max mmboost
max wab
max SE
get instinct
get bezerk or exploding arrows

exploding arrows does help if it's maxed. It's basically a free 1hko on everything at high levels.

Alternatively, you could get MW around 15x. This depends on party setup

After all of that, get stink bomb/sonic roar. If I had to pick preference, i'd say sonic roar. It's basically a much slower version of arrow rain.