[Lyoven]

its 1 skill point every 2 levels starting with lv3
so you get your first point at lv3, the 2nd one at lv5, then 7, 9, ect

about whirlwind, im not so sure about the skill. it does nice dmg, has a high sp cost and a veeery long cooldown. useless to AoE kill monster with this skill only. maybe if your the tank of the aoe party you can dish out some dmg with it to speed it all up a bit.
got to see, got to see

for pvp we usually need high dmg skills directed at 1 target. power hit is ideal, and precise attack seems nice as well (highest dmg skill as far as i see).
accurate strike is also nice. 3rd highest dmg. both these skills have 50 seconds cooldown which is a lot better then 3 minutes.

i could well imagine mages being afraid of a power hit-precise attack-accurate strike-whirlwind attack-power hit combo =)