I think people may have misunderstood my question here or I didn't make it clear enough. My pets were dying as they trailed behind me as I traveled from pylon to another, drawing aggro from random foes on the ground, not when I was in the bowl. Then got kilt before I could resummon them in time to, well, not get killed. Redlynne probably nailed at leats part of it by pointing out I was relatively low level. Once I got to the bowl, alive, things where fine and if I lost a pet or two, I was able to comfortably resummon them before anything bad happened to myself, and as a /Nature MM, I was still indeed capable of contributing to the league.
I was asking if anyone knew of some plan of action to avoid that dying before the pets come out again or maybe some way to preserve them during the pylon trek. It appears Apparition suggests waiting out the brief bomb set-up period, and then summoning once folks travel into the bowl, so I'll give that a shot next time. It would make sense because by the time people hop down in there, there's a whole forest of green heal numbers flying about.