I played as a soldier too. Its the most boring option I suppose but I figured he would be the most rounded of all the characters and the easiest to play as for my first playthrough.
Lvl: 40
Health: 857
Shield Capacity: 909 Recharge Rate: 99
Grenade Mod: Explosive Contact, 83 damage
Rifleman Class Mod: +36 Combat Rifle Damage
+ 3 Assault Skill
+ 2 Overload Skill
I tend to only use two guns, one is an Assault Rifle with 133 damage, a 1.4x zoom, + 70 damage and +33 recoil reduction and the other is a shotgun (which I used alot in Zombie Island) which has 100 (x12) damage and is f**king brutal up close. Other than that I have a rocket launcher which is hugely powerful but Ive never really used it much and a Sniper with 548 damge and +200 critical hit damage. I use the sniper alot to thin ranks from a distance. Im on the look out for a revolver as a sidearm to take down shields and then switch back to my Shotgun or Rifle.
In my skills I also have the ability to heal myself and others in range when I kill an enemy so if youre close by it comes in handy. the majority of my skills are in the Infantry and Medic branches.