Pretty standard marine layout. a1,w1,sg,a2,jp,kill hive. Other points are for various toys as needed or w2,3. Welder if CC is hurting, ping if there are cloakers pwnz0ring me, etc. etc. That's one of the problems with co at the moment. This layout is so standard I can't think of any way to improve on it. The shottie and the JP are so horrendously overpowered, that I feel silly taking anything else. Although if there are LOTS of big lifeforms showing up, I'll grudgingly take an HMG, although I hate doing that since it makes hive killing so much slower.
On aliens it's usually next ability, save save save, gorge, fade, adren, regen, cara, then other toys as needed. If the other team is showing a lot of skill the adren and regen will come before the fade. But usually I can manage to survive as a vanilla skulk with nothing but leap for long enough to save up at least two and a half points, then just gorge on the hive and heal the hive to get that last point.
Co is just too repetitive. Maybe I should try HD's game of assorted builds and stop trying to be WINNAR every game, and just play around.