Yeah i would not invest in speed but rather in her SpD or Physical Defense because a common thing is Kang Bisharp in order to shut down that Trick Room immediatly.
also something that is big with this trick room is gastrodon as a switch in with Storm Drain so you can protect your Camerupt from the 4x Weakness.
Also something that Eckley is going to like, Amoongus in the Trick Room setup can put the enemy pkmn asleep very quickly and tank even more for your camerupt : 3
Yeah the assault vest would be another thing i wanted to mention and I personally prefer Hyper Beam on Sylveon over that Return just because it deals an immense amount of damage and you use it to OHKO a pkmn and return might not do that.
Also you might go with psyshock on cress because you have a lot of sp atk and this sp atk which targets the physical def might help you in some cases. Personally i also run flash cannon over the HP ice on camerupt.
also something that is big with this trick room is gastrodon as a switch in with Storm Drain so you can protect your Camerupt from the 4x Weakness.
Also something that Eckley is going to like, Amoongus in the Trick Room setup can put the enemy pkmn asleep very quickly and tank even more for your camerupt : 3
Yeah the assault vest would be another thing i wanted to mention and I personally prefer Hyper Beam on Sylveon over that Return just because it deals an immense amount of damage and you use it to OHKO a pkmn and return might not do that.
Also you might go with psyshock on cress because you have a lot of sp atk and this sp atk which targets the physical def might help you in some cases. Personally i also run flash cannon over the HP ice on camerupt.