I feel like the Assault class has really weak armor considerng the fact that it would be used for say ASSAULTING? Also I think it could have a better jetpack compared to the Tank and the Gunner because Assault is lighter.
I never upgrade the assault's yellow skill because it doesn't do much for the money it asks, flying can help in areas but imo not worth upgrading from the default 3-4 seconds you get. The default class has ammo and fire rate endorsements, you could always swap one of them our for armour in a custom build.
get a custom class and give him armor as your gold endorsement. also, your jetpack already IS twice as good as the gunner and tank's jetpacks, combined.
Regarding the yellow skill (jet pack), I usually don't buy points in this skill either, but it can be a very effective defense against those pesky assassin backstabs, since you can't be grappled while in flight.
I love the jetpack, especially when you upgrade your passive skill it increases your jump. Your vertical jump is high enough to shoot over most barriers and with the jetpack you can just hover above it long enough to take out that guy diving for cover. Also flying around on the second level is really useful for cover and running away seeing as most characters can't follow you from one bridge to another.
