I usually use blackbird,huey,hind, but sometimes dogs can be more useful, because if your hind gets shot down straight away its kind of a waste to use your huey..
Or if it's too hard I'd go with hardline+napalm(care package if you got hardline pro),blackbird,huey.
If you get around 1.0 KD then it should be as is (in my opinion) Spy Plane (better than you would think), Counter Spy Plane (blocks off black birds so its amazing) and Care Package (if your lucky) or napalm Strike (gets huge kills especially on small maps). Thats just my opinion ^^
All depends on the mode you play and maps. Like if you're playing nuketown for just a TDM then things like Sentry guns, SAM turrets, and napalm strikes are sufficient enough, maybe even a chopper gunner to piss people off since it's a small map.
Now on the same map playing S&D you'd need spy plane, cobra, and dogs. Things that enable you to have more "players" on your side.
So it all depends on what you play and how you play. I play Hardcore match's more often cause it's rather enjoyable pissing people off with Motar Strike, then get the SR in the sky for teammates, then call in dogs for the bigger maps.
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