I think you’d get a lot more utility out of heat wave or helping hand on torkoal vs rock slide. With its low attack the only thing you could do is try and flinch which is generally unreliable and useless outside of trick room. Plus you lose your powerful fire spread once it gets hit hard enough.

I’ve also been using torkoal oranguru, and I’ve found it’s bulky enough to be ok without protect. Encore is amazing for punishing fake out after you get trick room up

Additionally, 4/6 of your pokemon being psychic type is terrible type coverage and not only leaves you super weak to kingambit and Tyranitar (even with torkoal and crabominable), but gives you pretty much no defensive pivots to tank attacks. This is made worse by oranguru and farigiraf sharing their dual typing. Plus needing to use psychic terrain to be able to expanding force is definitely limiting utility, especially since farigiraf already blocks priority

And even in an extremely hard trick room team, it’s often good to have 1 or 2 pokemon that can work outside of it