How do you defeat last boss?(Spolier?)

If you look up, there are 4 slanted rods holding his platform up. Hit the little brown/black (dont remember) notches to make the platform fall. After it falls, a spike is hanging up above him. Shoot out the little bars holding it up. That will miss him too, so wait for him to appear and blow his brains out. Oh, and watch out for the holes he'll blow.

And if you run out of ammo shooting the rods, open the door you came in out of and there is a bunch of ammo to your left, just be careful not to hit the fire.

I'm stuck on the same spot! I've been able to get the platform to fall and hit two or three of the pins holding the spire, but end up getting killed before I can get it to fall. Also, I always get burned trying to get the extra ammo. I'll try bullet time to slow down everything tonight!

Easy Tip for ya:

Zoom using the rifle (i think its that weapon) aim for the rods "IN" bullet time so he cant hit u with molatov cocktails. once u do that down his level will come do it again to the spike and he will finally be shootable, get one clear shot enter bullet time and fill him full of lead.

I don't see which supports to shoot. Which room? The first one with the guard with Vlad on the platform or the other room with the broken elevator. Please be specific because I'm pulling my hair out.