I believe rough seas may not go well on Jolteon, as he only has 90 hp(given the fact that many pokemon can KO 90 HPs in 1-2 hits, what's the point of rough seas on jolteon? In my opinion, the answer is: None, as today's metagame is tough on decks with only 90 HPs, as one powerful hit from many Stage 1 evolutions that have powerful attacks in their effect text, and/or the majority of Stage 2s, and if jolteon survives, it will still be too much to just rough seas on it hoping to dodge a KO w/o extra healing items like Pokemon Center Lady, even if it means using up your turn supporter to do so)...
However, I believe it still can do well as a bench-sitter while other, more powerful pokemon do the attacker role, like, for example, M Tyranitar/Yveltal/Jolteon/Flareon, complete w/ Team Magma's Secret Base and Silent Lab. You could replace Secret Base with rough seas if you wish to do so due to Jolteon, so that your attackers can heal if they have to:
Pokemon(17)
3-3 M Tyranitar-EX
3 Yveltal
4-2 Jolteon
2 Flareon
Trainers(31)
4 Sycamore
3 Professor Birch's Observations
2 Lysandre
1 Teammates
3 VS Seeker
3 Ultra Ball
2 Tyranitar Spirit Link
2 Weakness Policy
2 Exp. Share
2 Muscle Band
1 Battle Compressor
1 Tool Retriever
1 Professor's Letter
2 Team Magma's Secret Base
2 Silent Lab
Energy(12)
8 Dark
4 DCE
^ Mega Rayquaza, as well as Mega Aggron(if Muscle Band was placed on the M Tyranitar-EX prior to using Destroyer King)/Various Metal powerhouses, may think "your deck is easy to KO. Before I place my Pokemon down, I'll replace your stadium w/ Skyfield to ensure that your stadium fails to damage it! Ha ha ha!", until they face a Mega Tyranitar w/ a Destoyer King that has Ray/'Gron's weakness type with the help of the Eeveelution abilities and get slaughtered as a result despite the fact that skyfield shoved the magma stadium aside before any pokemon was put down, ensuring the pokemon that was put down does not take 2 damage counters from a stadium effect, and yet, thanks to Jolteon/Flareon's ability, the benched pokemon on Ray/'Gron's side might be surprised and could feel afraid that they could be the next to fall to an ability-triggered weakness from Jolteon/Flareon when their commander falls in such a fashion. What a plan B indeed!