5k HP Blitz.
Switching banshee's veil with force of nature will be good against AP. This will also mean switching your sunfire for something else too. You could either go for another force of nature or spirit vasage. Maybe spirit vasage first before getting force of nature.
Going up against a full team of dps will be good if you switch banshee's veil for another randuin's omen. This will mean that instead of getting one Heart og Gold before getting boots of swiftness(in this case it should be ninja tabi because the team is full dps) you should get two Heart of Gold. Continue your build to warmog's armor and then get your two randuin's omen. Finish with thornmail ONLYif you are tanking them nicely so you can return damage. If not then finish with sunfire cape for extra hp and armor.
This is how I would play him.
Just because you have 5k hp doesn't mean you just go in to tank. Have to play it safe to farm money with Heart of Gold.
Remember to always cast Randuin in team fights and use your ghost to chase after enemies for the hook or use it to get out after you use your Overdrive (when you get the debuff from Overdrive).
Try not to change boots of swiftness because it is for chasing after enemies for hooks. Its +1 speed more than most people's shoes makes it so that no one is out of the reach of the hook. You should only change these shoes to Mercury treads or ninja tabi if the entire time is entirely stuners/slowers or lots of dpsers.
If they are basically 4/5 of the same type of characters than you should change your item build accordingly to the other team.
This regular item build is made to go against teams that are all around and the runes can be good for any tankish character since you always need the hp.