I'm still plugging my way through it again, I really wish I kept the saves from my first shot. For what it's worth I'll be getting to level 60 before ME2.
Make sure you use your soldier's biotic powers such as the overkill, shield regen, cooldown, unity, etc. They can help immensely.
Im a Soldier class so. .. . . . . .I got one third of its health down, went to a short cut scene then carried on but then i died. Already getting tedious so may give it a rest. The other one's had a stratagy to killing them, cant say the same for this one.