I debated this as a wizard but the idea was hasty and after looking more into it, it really isn't a good idea.
1. In raids right now, with optimum gear choices, im getting 93 - 95% crit. I wouldn't drop STR line till I could self buff an easy 110% and even then, i'd prolly be able to swap some items that have a mix of effects, and a few future upgrades in mind carry less crit but more effects...so aside from Traks belt I don't see my current crit skyrocketing soon. Which would leave me around in the 80's for raids.
2. To get an extra end line ability we would have to drop points in freehand sorcery (assuming its at 7/8), thus losing more dps over an ability that isn't offering more neccesarily. And since dropping 12% reuse is just stupid, your looking at dropping the power consumption one. Nothing amazing but I like it more than the other 2 end lines.
3. You can easily compensate what the other two lines offer with things available in game.
STA = provides more HP and manashield to give extra survivability. Buy an HP horse, use a constitution potion, and use two +100hp adorns on rings, and there you just gained ~850 hp. Spec for the two extra 2.5% health in character traits, and spec for +STA choices as well.
INT = deaggro. This depends on gear access but -
nuff said there, traks gaze basically blows the INT endline ability out of the water. And it seems to drop almost every Trak kill instead of his belt!