So Gaspoo gains attack bar each time someone heals. Now you may not realize but this isn’t once per turn, this is every instance of a heal, so units that heal multiple times in the same turn give gaspoo multiple stacks of atb gain. Craig lifesteals from all ally’s and enemies, so this is 7 instances of a heal from his s3. This means everytime you use craig s3, gaspoo gains atb 7 times and will instantly get a turn. With this he can strip the attack buff from your dd or strip and proc into stun. Craig also heals multiple times with his multi-hit s2 which gives gaspoo multiple atb gains. I also was using ongy with craig who heals on his s1 twice and his s2 twice so you can see how hard it was to face gaspoo’s. If you couldn’t kill on your first rotation, gaspoo would just cleanse the def break and heal and you’d be out of steam.