I would use both with Alphamax however I would take it slow with the OxyMax as it also contains a full dose of Forskolin.
I would start with 2 caps of Alphamax twice per day, 1 cap CarniMax twice per day and start with just 1 cap of OxyMax immediately upon waking. After several days, I would then add in the second cap of OxyMax, again this isnt because OxyMax is a strong stimulant, but simply to allow your body to get used to higher doses of Forskolin.
OxyMax XT: 1 capsule immedately upon waking. After assessing tolerance you can consume additional capsule upon waking or 6-8 hours later.
Alphamax: Consume 2 capsules twice per day, perferably 2 pre workout and 2 before bed time.
CarnIMax: You can take CarnImax whenever you'd like, just make sure to get in 2 capsules a day for a minimum of 1g PL-Carnitine.