The DPS check on Lyon isn't actually that tight if the group going after him is specced for damage with breath of the martialist/aetherweaver/skirmisher, but I've noticed a woeful tendency for lost actions to be ignored entirely judging from how few rezs tend to go out in the average CE (The Resistance Phoenix is an instacast 100% HP rez and you can hold several if your pack isn't too stuffed with costly actions like manaward).