Talk:SAS: Zombie Assault 4 Skills/@comment-30964611-20141102193042/@comment-10540150-20141102221922

As you said, Body Armour wouldn't do a whole lot for a speed character. Deadly Force isn't one of those things I'm very fond of in the first place, as it's only going to give you up to 20 extra damage per level(And that's for the regular HIKS!). However, it will be extremely strong in the late game when weapons can have around 700 damage per shot, which will get a mighty increase from a full Deadly Force path.

Killing Spree is a fairly viable option, actually. But it's very unreliable at later levels as if you come across multi-resistance zombies, you typically can't get the spree going in the first place.

I've never actually considered leveling Adrenaline. However, it is the most reliable thing on your list as it gives a decent buff and doesn't require luck as Crit Chance does, or variable effectiveness as Killing Spree does.

Crit Chance, meanwhile, is actually fairly similar to Deadly Force, in that it takes a while for it to actually become noticeable. Obviously, a single point in it is mandatory as it's a choice of never critting at all or giving up a skill point for the chance. Unfortunately, in order to balance the game, crit builds require dedication, and you're going to have to augment things to make it truly shine. Nonetheless, I've heard that a speed crit build is extremely powerful, as you just kite around while laying into things with super powerful crits.

I'd have to say it's up in the air between Adrenaline, Deadly Force, and Crit Chance, but in the end, it's up to you and how you want to play.