Anyone have a macro that will target the frozen tombs for me then LB =]

I have a DK tank and 4 shammies (1 resto)

I'm having a god awful time trying to down the first boss. He either Tombs my healer or he tombs my DK and i'm not that great at multitasking. I tried to use magma tots to break the frozen tomb but it wasn't appearing to be working :S