>>319097338
How I would balance the targeting:
>Striker
>Does the most damage
>Has limited shields that quickly recharge but can only take one or two regular hits and one big hit. But has average health
>Uses short twin blades
>Can get in and out of the damage zone quickly so more likely to dodge and block attacks, but it very weak against aoe boss attacks and status effects, but its basically useless in the outside zone against the boss and uses it to recover and look for opportunites to get back in or pick off minions to help Sniper and support until they can heal up and get back in
>Sniper
>Has the most health 
>Average shields but recharges slow
>Has twin pistols
>Useless up close against bosses but needs to get close to lay down traps 
>Does less damage than striker but can easily pick off minion to weaken them and suppress them with aoe specials
>Main special is a charged shot that does a good chunk of damage and can break certain bits of armour off bosses
>Support
>Healing class. Cannot do direct damage to boss
>Very frail but has the best shields
>Can remotely spend its own shield power to restore shields of other players as a sort of quick heal
>Fastest shield regen as long as its not being attacked.
>Can provide healing and buffs to other players 
>Also can easily stun enemy minions but cooldown on aoe is slow
>Ultimate ability is temporary invincibility to all but leaves it incredibly vulnerable after it times out. Like a sitting duck any hit kills.
Each class can also use a support ability that lets them swap places with another player. So can pull their allies out of trouble or get back into the fight quicker as long as they can target them.