It's actually been the other way with my matches. Substitute blocks ferrotroll's leech seed, and for some reason they're all running Leech Seed, Stealth Rock , Spikes, Protect, so it just gives me a lot of set up time xD. I came across one with gyro ball and it was a bit problematic since it was a mind game of recover vs. Substitute since sub blocks leech seed and recover, thankfully most haven't been running Gyro Ball so yeah.
Also if you wanna troll ferrotroll you could use Roar, which is a way more successful then I thought it would be. Forcing Ferrothorn to take an extra 25% + 6.25% of hazard damage is nice, and you only have to roar twice for it to die, not to mention that it forces damage on other things and is nice for luring out scarfers that want to outrage on you :P
(15:32) Dusk [DW Uber]: Actually Deoxys-a is not the frailest uber
(15:32) Dusk [DW Uber]:Its Carvanha
(15:33) X-Spin: O.O What are its bases?
(15:33) Dusk [DW Uber]: 45/20/20 so close to matching Deo-a's 50/20/20
(15:33) X-Spin: That's enough to wall Specs Kyogre!
Great Sage is the best.