Personally, I'd consolidate as much as you can into the one platoon, and take a vet squad as your other troops.
That way you can drop the sentinal, give the platoon some better heavy weapons, and give the vet squad plasmas, so you have a versatile list that has a platoon for popping tanks and infantry, and a vet squad for popping those annoying bastards that use power armour
=D
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Bender wrote:
"Ah, screw you. I'm gonna open my own casino... With black jack... and hookers..
Ah, forget the blackjack"
I've never been good with wirds