Only time I've ever really used Kylo's Outrage for the purpose of healing is when an arena Battle has gone south. You should have FOST and KRU taunting almost 100% of the time in an arena battle and Kylo will be healing every time he uses Lash Out under zKRU lead. I'd say a good 95% of my arena battles he'll be the one with full health and protection at the end without using Outrage, except to stun someone with tenacity down or if Lash Out wasn't off cooldown.
That being said, I've had Kylo block out 3/5's of a Bastila team purely because they couldn't damage him more than he was recovering by spamming Outrage. (And below full health too, it got real ugly for them)