Are you wanting to dose 4 caps of AT2? Just curious as the recommended dose is 3 caps. I would do 1 cap AT2 in the AM and 2 caps with later dose. 25-50mg of Forskolin with each Alphamine dose would be nice. As for a pre-workout with Alphamine, depends on what one you choose. Many have dosed one scoop of Alphamine with a scoop of pre-workout of choice and been fine.
Edit: never mind on the AT2 dosing and Forskolin. I read it wrong. Looks good.