Currently, we have two types of Techs: Active (you press a key and they activate) and Skins (which are a bad idea, if you ask me.) I am suggesting a third category: Reactive Techs! Reactive Techs react to an event, then do something, although they can have very long cooldowns. Here are a few example reactive techs: Emergency Stim Injector When your health drops down to below 20%, you regain 50% of your health over 5 seconds. Cooldown: 5 minutes Reflection Shield When hit by a ranged projectile, you have a 15% chance to reflect it back at the attacker for 50% damage. Cooldown: 3 seconds (only if successful) Electric Shield When hit by a physical attack, you have a 15% chance to inflict 50% damage to the attacker with a 15% chance of stunning them for 1 second. Cooldown: 3 seconds (only if successful) Emergency Bubble When about to take fall damage, you bounce away unharmed, instead. Cooldown: 1 minute Force Blast When your health drops to below 30%, you emit a blast of force, damaging and knocking away all nearby enemies and projectiles. Cooldown: 3 minutes Automatic Defibrillator When you are killed, you have a 10% chance to revive at 50% health. Cooldown: 10 minutes. Reactive Techs should hopefully introduce a new element of customization to the gameplay and make techs more than simply navigation enhancers and (poor) progression restrictions.
I like it. I think maybe these effects would be better suited to armor or items though. It would be pretty deviant than techs current functioning. Even then, I like the idea of creative effects that aren't on command!