https://pokepast.es/f9e22234dac8f347
So I made a team with Defog Decidueye H. I changed the set a bit because in testing Tusk was much more important as a MU than Gholdengo. Now Tusk absolutely loses to you. With some prediction you still Defog vs Ghold.
I wanted to run a team that really appreciate Defog and I arrived at Garga and Heatran two guys who seem immortal without hazards. Gliscor also really appreciates no Rocks. Finally I ran Prima and Sub Pult. These two also go berserk without hazards
The team is extremely, extremely powerful. You have just such solid mons with sets that heavily tip all MUs in your favour. You have a borderline unfair MU into Boots spam, Webs and Stall.
TSpikes is a little annoying so you can make Deci Boots but you have 3 Toxic Immunes and Deci can hard switch and Tera if you absolutely don't want TSpikes up.
Do try it out once, Decidueye is such a cool guy and has a really decent niche.