Last week I hit Veteran with this team but with G-Moltres as the lead. I started running into a lot of Ampharos and due to being double weak to electric it became a bit of a problem.
In the interlude season earlier this year I was using Grimmsnarl as a fun bit of spice, and given I had already hit my target I decided to use it again for some fun. However to my surprise it ended up being a huge success and pushing me all the way to Expert for the first time!
Grimmsnarl is quite frail but incredibly fun to use. For some reason I was running into a lot of Zygarde, Regidrago, Jellicent & Armoured Mewtwo leads which it would feast on. It was an incredible core breaker and I’m surprised it’s not more common. I did run into one trainer also using it, kudos to you!
The most problematic leads (Tink/Florges/Melmetal) started to dry up the closer I got to Expert. Empoleon also beats this entire team, but I rarely saw that too. Melmetal is not as common in ultra league compared to great league, but if my Corviknight wasn’t aligned on it to do sizeable chip damage it would usually end in defeat for me.
As for the others, I know it will upset people seeing another Mimikyu team being successful. I think the most sensible nerf would be to make shadow sneak a 60 energy move so it can’t double up, reducing its pacing further. Corviknight is the damage sponge of the team and comfortable deals with any Tink in the back. I did notice that the majority of other Corviknight I faced had Payback whilst mine had Iron Head, so the mirror was nearly always lost as a result.
Not long after hitting expert, I had some bad sets so have dropped closer to Veteran. I won’t try to push much further as the skill level is difficult and the queue times are longer, but would really recommend Grimmsnarl if you build around it!