i'm fairly certain that you won't have aggro issues if you don't use VE, with a decent tank. at the very least you can remove 1-2 points from threat and put them elsewhere. but alright. if you wish, at least the one without any points MB should be revised.
I am top on threat meter every raid and i never use VE on bosses. MB does all of my threat, so when i think i am going to over arrgo i stop using MB then only MF and SWP then my threat drops significantly. I have almost 500 spell power unbuffed btw.
Ya i would change the Mental Agility mana issues but what else would you even take. I guess you could take 3 points in Blackout or you could take Silence, both of which dont really matter in PvE raids that much at all.
Because trading SWP for a spell that's twice as mana inefficient and generates double threat on top of that totally makes sense.
The only reason why you would not use SWP is because your guild will not let you use SWP cause it uses a debuff slot. So i made a spec for ppl that are not using SWP or VE in raids.