What kind of terminators? Assault or manly?
Ian and Rick both make excellent points. Assault terminators need little help to survive. Also, thunder hammers belong on terminators, not line troops. Think about what makes ba better than vanilla sm and consider what makes vanilla sm so strong.
Sm shooty with chaos like melee.
the terminators are manlys with a cyclone and 3 chainfists. the only difference is we get furious assault and fnp. which fnp seems to never really help, since anything a vanilla would worry about in combat or at range cancels out the fnp
Ok this is something I can work with. You have 5 manly termies, why are they in a stormraven like namby pamby assault termies. Stick them in a fire support role, while removing the jump packs on one of your assault squad, giving them assault weapons, a sang priest with no pack and go to town on someone.
FNP is pretty fucking awesome, but you are basing your army around the concept of FNP. You want to be able to functionally dismantle an adversary without having FNP, using FNP to supplement your forces.
What makes Vanilla Marines pretty sweet is their point cost, the ability to take vulcan vastly improving your ability to take stuff out with melta's, long range firepower, and their armor save/ballistic skill.
The thing that makes BA awesome is not that they can get FNP, but their ability to take units that are CC beasts with the added incentive of being able to score objectives. BA are almost as good as CSM (who get Bolter/BP/CCW) for close combat, they are just a bit lacking in the range category.
I will be around tonight working on my guard list if you have any more questions