Turn the area into putting green. You will still be wet from the atmosphere. Can't be helped. Find a place, NOT too near to make your portal.
Make a line of fires all the way to your portal (one of the circle buildings is good if you are lucky). Make an area under random trees for more fires, not that you will use them...
There is a reason you have all those skele pieces. Make the big stagbreaker. Or you can make the iron sledge. Interrupt his puking in particular. watch your stam, don't get excited, only use it when you need to. The aoe also kills adds, kills blobs, makes skeles explode, you never get poisoned tho it shouldn't matter cuz you have on your abomination gear, or at least the one piece, &/or potions. Really, pounding the ground makes it all go fast. Watch his movements. He telegraphs for a long time what he is going to do next. Iron mace and shield if you get bored and decide to melee him a bit, only from the side tho, so you don't have to roll out of his aoe. just walking to the side is free, rolling is costly as is hopping around or running. Use the alter for LoS.
Enjoy.