Needs a bump anyway but...
My Lore-Master draws way too much aggro and the pets don't hold it well enough. I made it to level 20 and am now "Edhuil the Undying" but I just get mobbed in group skirmishes.
Are you doing the skirmishes with a group, or trying to solo them? If you're with a group...granted, I've not yet played a Lore-Master, so I'm not too sure how they work, but I'll assume it's like the Hunter when it comes to group skirms: deal out tons of damage without drawing aggro.
What I usually do to reduce aggro with my Hunter is: hang back, and switch targets frequently (so I'm still doing plenty of DPS, but not all to the same target--if you stack up too much damage on one target, and it's more DPS than your group's tanks are dealing to it, it'll focus in on you instead). If I do draw aggro and it's more than I can handle, I run toward the nearest tank. Running away just makes it harder for the rest of your group to catch up to you and rescue you.

Also, to be honest...a lot of the responsibility for aggro management falls on the tanks. They have the ability to absorb all that damage, while us squishier classes don't. Make sure you're waiting for the tank(s) to attack a mob first, rather than charging ahead (and thus drawing aggro). And if your group's tank isn't doing his job and isn't holding aggro like he should, well...time to find one who will, IMHO. (Granted, mistakes do happen. But if this is happening consistently...well.)
Can't LMs heal as well, or is that Runekeepers I'm thinking of? Can you not heal fast enough to absorb some of the damage while the rest of your group pulls the mob off you?