Well, I switched from demo to destro, and summoned my imp. Much to my amazement I found a hot ticking on him. It was crit healing every .5 sec for 120 mil, with a duration of 25 days. I can't remember the last time I used my imp, it's probably been a couple months. I was thinking of what I could solo, so I went to heroic stonecore to test it out. I had him pull the first 5 mobs and unfortunately he only has 77k health. He survived for a while but had too much incoming damage at once and died after a bit. If I would have solo'd a boss it would've worked like a charm, as long as they don't hit for more than 77k. Here's a screenshot:
I tried switching between dual specs, pulling out my other pets, nothing worked to get it back after he died. If anyone has any ideas it would be greatly appreciated and could be an epic glitch.