I use ASAT for everything and own nearly the entire FL line. That being said, FL is dropping ASAT. I would invest in their Fusion camo if I had to start over again today.
Really? Do you know why they're dropping it?
The ASAT camo pattern is owned by the ASAT company and First Lite has or had a license agreement with them to manufacture clothing with that pattern. First Lite designed Fusion and now Cipher in conjunction with the Veil Camo company and First Lite owns the exclusive rights. I don't know First Lite's financial situation, but it would be cheaper to offer only Fusion and Cipher in the future and it would probably make the manufacturing and warehousing process more efficient. Personally, I would rather see them buy ASAT outright, but that is just my opinion. I own several pieces from the ASAT company, and the quality is not the same....not even close.
In regards to choosing a camo, it depends on the kind of hunting you do. For elk, solid earth tone colors will do as long as you mix and match the colors a bit to break up your outline. For elk, the quality of the clothing is more important than the pattern on it. You will want something that is light, durable, breathable, and doesn't hold a funky smell after wearing it for days on end while hiking for miles on end. Any merino wool base layer is awesome for that.
The situation is different for whitetails on two fronts. You would want some kind of pattern to break up your outline when sky lined up in a tree. ASAT works great because it makes you look like a a bunch of nondescript branches or anything other than human. When still hunting whitetails, pattern is exceptionally important if you plan on getting in bow range. On the ground, ASAT makes you look like anything other than human and deer will tend to ignore you as long as you control your movement and play the wind. Once they smell you, the game is over. I've used ASAT to still hunt and stalk within 15 yards of multiple does and bucks using ASAT. The wind is the most important factor, but the ASAT does its job. I've had several instances where whitetails stop and look straight at me while stalking them in the open and they just go back to feeding. I've done this three times this year and got as close as 15 yards on a couple of does.
For turkey, ASAT is tops. Turkeys see color and they see movement. You can get camo that makes you look like a tree, or you can get camo that makes you look like anything other than a threat. If you control your movement and pick a suitable position like a tree or bushes behind you, the turkeys won't even know you are there. For turkeys, I prefer my ASAT leafy suit.