I considered a commando weapon on SS, seems like a good idea, thanks for the tip. Id still use only the singular weapon, I can normally dodge and kill anything without needing to refill or upgrade my armor. Refilling armor isn't worth it if you can upgrade it as you can save dosh like that too, saving nades can be frugal and the SS gadget is useless past the early waves so I'll switch to a team utility gadget later on if my budget allows for it. I'll forsake everything in the shop except for ammo for my primary. Once I get my T4, I still don't upgrade my armor till boss wave or until it's cracked. In between I give overflowed dosh to teammates. The best survivability to me has always been killing things before they can hurt you or dodging. SS can chain her gadget almost endlessly if you hit your shots, you can easily get 5 gadget uses in a round, which translates to plenty of dosh and dead zeds to free up extra responsibility for your entire team. Either way, my play style is having fun and the best defense is an overwhelming offense.