I recommend you don't use Sheer force at all, you get at best 1 move that gets a 30% boost in from sheer force and generally poor power & coverage, not really worth it in my opinion.
Rough skin is the better option, as you're slow and bulky enough to take hits, you might even get lucky and turn that 2hko into a Ohko or 3hko to a 2hko because of Rough Skin.
name: Bandigon / Physical attacker
move 1: Outrage
move 2: Earthquake
move 3: Suckerpunch
move 4: Dragon claw / Taunt
Item: Choice Band / Life Orb
Nature: Adamant
Ability: Rough Skin
EVs: 252 HP/ 252 Att / 4 Spe
Dragon Claw in the last slot is more for insurance in case you see the opposing team carry a Steel like Aggron, if you happen to be stuck in Outrage dealing low damage while Aggron can hit back with stab Head smash
Outrage hits hard after you take out all the steels and physical walls on your opponent's team
Suckerpunch has priority hitting faster mons, Earthquake gives you coverage especially steels.
Although Durant and Ferroseed take EQ Neutrally, you're probably better off using another pokemon to counter ferroseed and Durant is frail, you should be able to deal alot of damage with EQ already.
the 2nd Physical Attacker set with Life Orb, I recommend using taunt to stop Bulky Ghost from Burning you with Will o wisp which would otherwise cripple Druddigon. Taunt also stops ferroseed thinking it can take your dragon hits and try to set up on you
You can also invest in some speed EVs to Taunt the common normal type special walls, namely Lickylicky, Audio and Clefable.
24 EVs allows you to outspeed Audio and Licklicky with 4 evs in speed, which is a small investment.
104evs out speed Clefable and Tangela with 4evs in speed as Clefable is capable of running the annoying flame orb trick set.
Other Options: You could Potentially run a set with Substitute with leftovers for better prediction but you won't hit has hard.