You get to deal 3-4k true damage if you land your Ws. Plus you are very tanky, easily reaching at least 5.5k hp if you stack heartsteel well.

You'll basically want to get Heartsteel as fast as possible for the stacks. However I like to build BORK first for better trading power since Heartsteel makes you a lot weaker early.

For boots anything works but I suggest not getting armor or MR because you want to stack your W as fast as possible. Only get mercs if enemy team has a lot of cc.

After that Titanic is a must to get that sweet AD from the massive amount of HP you're gonna have.

I suggest getting Anathema's if enemy team has a particularly fed or troublesome enemy and just putting it on them. Otherwise Sterak's is a nice item to have as the shield on it will get MASSIVE.

Finish it off with a Warmog's and you're basically set for some 3k True damage Ws. If you grabbed Anathema's, you can swap BORK with sterak's at the end.

If you're going conqueror, play like you would regular sett with BORK. Once you get heartsteel, you'll basically want to trade whenever possible to get the extra HP.

Your teamfight potential is huge so try to stay with the team and use your R to engage when you see you can land in the middle of their team, this is where you will drop your nukes.

You have very good scaling with this build so dont feel too rushed to end the game.

You're a lot weaker early so just try to maximize your grasp with short trades while getting heartsteel stacks. You'll eventually scale enough to just clap whoever fights you.

This playstyle is a lot slower than with conqueror but it can be very strong lategame thanks to the huge amounts of HP and AD you will receive from titanic and other items along with grasp.

The late game is the same as conqueror however. You'll basically want to use your R to engage into their team and just drop your W nuke and tank their team while yours finishes the job if your W didn't kill them all.

Having less armor and MR means your grit will stack a lot faster since you'll be taking more damage. In other words you get to smack them with your W earlier and more often.

You'll still be tanky due to the sheer amount of HP and shields you will have in the late game. The biggest threats are the % Max HP champs but you can just use Anathema's to reduce their damage by a whopping 30%.