Whhhhaaattttttt "Other options"?
I've been able to stay in like the top 50 for like the past 1 1/3 years using the same Cresselia set. Sure you know its burnt, but knowing is not even half the battle. You have to know how to deal with her.
You really can't send a physical sweeper in on her in fear of getting burnt. I use Psychic for STAB, breaking Rotom's subs, etc. and not to mention that OU Guts users are Fighting types and don't like getting hit by Psychic.
I'll be glad to show you how good she is if you want. I'll be happy to go on a laddering spree with you watchin' or if you wanna play me let me know.