I spent 7 apples and the 60 minutes, but I couldn't kill any of the 4. With my buccaneer with a similar attack range, it took me 15 minutes and 2 apples. There's something weird here. Do fire attacks heal the mobs or something like that? They should add a health bar to the red crockies.
i dont think its a bug, they just heal. since you were using hurricane on low range and you hit a different mob everytime, they just healed faster than you can kill them or fast enough not to die in time. you need to isolate them (somehow with puppet?) and kill them one by one if you want a chance at clearing this in time. same thing goes for bloodwashed MM with snipe.
Recently, there was an issue with fire attacks that was patched by the server. I thought it had something to do with it. With my MM, I didn't have any problems. Using Blizzard + Snipe + Frostprey.
I was there for half an hour and couldn't kill a single Red Crocky. Using Inferno + Phoenix... Unfortunately, I got DC.
They each heal around 10k HP every second, so it's probably a DPS issue. Level up/gear up a bit and come back later, and maybe swap to multi target attacks instead of hurricane if you can't isolate one