I didn't say anything about "Avoid Careful Aim", my point was that as far as maximum burst potential to be achieved, you'd want to max out Lethal and stick points in Mortal, but at the expense of Imp Conc Shot... which you'd only want to do after getting some decent experience under your belt. Careful Aim is simply too valuable to not get if you are going to put more than 5 points into MM.
Personally, I tried the Int Build and various other builds out for a while and grew bored with the kiting and went with an experimental "Melee-Ranged Burst Combo" spec... I'm looking forward to trying it out with Worgen/Troll (For Dedicated Anti-Hunter duties), Orc (Absolutely the highest Burst Potential I can theory craft), and Tauren/Belf (Dedicated Anti-Healer duties, with the former having better potency vs Avoidance Stacking Players) and Human (2x AGM, need I say more?).