Single pattern for me, the Mag exhaust port doesn't need a split pattern cam.

I'd pick a Hughes 218 lobe for both intake and exhaust, ground on a 110 LSA. This has 0.539 calculated lift with the Mag 1.6 rockers.

If you're going Mag, then go hydraulic roller as it's easy to get there when starting with a Mag engine.

I think this cam with your setup would be killer.

R.