Well my hunter i went with the adventurer thing(+10% luck and +10% crit damage) because i wanted to go full crit and it seems to be going pretty good so far.
I chose to do FULL crit on my expertise to get 20% more crit rate.
I did not have to worry about what skills to choose because i would afk with my tiger so i had allot of extra points. But always get the tiger
Unless your doing only hunter and not a 2nd class i would NOT choose more than 3 skills that cost $ or you'll go broke at lower levels. With that i chose the lock on skill(root for 6 seconds and increases damage taken), and the buffs wild and eagle eye. If you HAD to choose the best one i would choose the buff wild b/c of the +crit rate, at lvl 23 i had ~17% crit rate and with buff it jumped to 30%... really great buff
The best skills? Tiger is the best always get it. You need class level 5.
Another build i thought of trying was pure attack speed.