Thought I'd post this :)
 
There is a tree that can be grappled to where you first land. If you stay here and just use weapons until you knock it down it will evade its two most lethal attacks. The burrow and shockwave attack are instant kills on commando mode but if you grapple to the tree and hold on you will stay out of harms way.
 
I realise this is probably common knowledge by now, but still, it makes cakework out of what would be an incredibly irritating boss.