Merc:
Replace Trauma Regulators with a utility that increases movement speed by 100% for one second after casting Tracer Missile or Power Shot.
Sorc:
Add a utility that increase movement speed after casting Lighting Bolt by 100% for 1 second.
Add a utility that changes Static Barrier to a toggled, always on buff that reduces all incoming damage by 20%, but can no longer be cast on other players.
Consider giving Lightning some armor penetration too, as all of it's lightning damage is mitigated by armor.