Guild Wars 2

Tailor their surviveability to their purpose:

Medic Gyro: 5 seconds of block on summon. Heals steeply scale with number of allies.

Purge Gyro: Modest Hp pool. Inflicts weakness when hit. Absorbs conditions instead.

Blast Gyro: 2 stacks of stability. High Health pool.

Sneak Gyro: 3 seconds of personal stealth on summon.

Bulwark Gyro: 3 seconds of invuln on summon.

Shredder Gyro: 3 seconds of evade on summon.

Purge and Medic sound like nice alternatives. Also liking the edit change you did with purge ^^

Medic Gyro would be awesome if instead of the block, it just copied 2 or 3 (Max 15 second duration, wont stack above that limit) of your boons to party members per healing pulse of everyone inside the ring. 4-8 second boon duration per pulse.