Your maximum AP increases by 1 each level of CON, which is notable, because normally bonuses are granted only on even-numbered levels. 18 AP with those talents would be 9 CON.
My Rogue isn't a Shadowblade, but he did have to invest in two pieces of +CON equipment just to stay viable after level 4. Other than that I was splitting my points equally between DEX and SPD, because the movement bonus you get from SPD adds up pretty quickly and is very noticable.
Way of the Warrior 5? As in 15 ability points? I suppose you could if you found a lucky +1 WotW item and spent 3 of your starting AB points to get it to rank 2 at level 1, but that is still a hefty investment, unless you want to skip all magic, and certainly not "quick", since that requires you to be level 8 minimum, by which point the beta is nearly over.
