So, I don't normally min/max attributes, but I decided to give it a try after reading ntsheep's guide. With respec, it's fun to play around.
I set-up my Lvl 16 Scout for max crit:
Attributes/Skills: Focus: 16 - increase damage multiplier Stealth: 16 - increase damage multiplier Strength: 4 - started increasing to improve hit % after maxing Focus Gunnery: 6 - started increasing to improve hit % after maxing Stealth
That's a pretty good Scout build there. If it seems like if\when a xeno does find your Scout, and you take a lot of hits, try increasing Evasion some. You can focus on just building Strength to get your hit % up and put points into Evasion.
My scouts have had a short life expectancy on ironman sadly.
I'm finding I have to be rather careful with my scouts even on demanding. Bad luck on spawns and attack rolls can play havoc. Aborted one mission after a scout had Xeno spawn near him and manage to hit him with 6 shots despite his 17 ranged defence dice
Guns! We need BIG Guns! Then again what do I know I'm crazy!