Do you have any grass pokemon that are of note? Exeggutor, Venusaur, Vileplume and Victreebel are the strongest options, and have the benefit of resisting water attacks (for the final 3, do watch out as they are weak to extrasensory).
Your Jolteons should be good. 20xx-2200 is already a very powerful Jolteon. If you have 3 of those definitely use them in your lineup. I would substitue Zapdos with any grass attacker listed above, if they are already above level 20.