Moreso in prime but even normal gambit they need some form of counter. My suggestions: 1. Wall hack lasts first 10 seconds then dissapears. 2. Prime set overshield needs to not be so bulky, you need a direct hit with truth to have a chance at securing the kill and even that sometimes hasnt been enough. 3. Damage buff should ONLY be given in the event the invader defeats all 4 enemies. 4. Sentry set should counter invader set bank lock with it's own t4 perk by forcefully unlocking the bank when the sentry is near the locked bank. 5. Sentry set should recieve a radar ping perk that gives you a general but not precise idea of where the invader is.