I've used a team that is basically identical to this, with the exception of Specs > LO on Torn-T and SR Mamo > Chomp, so I think I can give you some input here. First off, I agree with what dragonuser has said, Toxic on toed is a great choice. When facing bulky waters such as Rotom-W and Jellicent, hitting them with a Toxic can basically cripple them for the entirety of the match and help you in breaking them down quicker for your mons to sweep. As a matter of fact, bulky Water-types with will-o-wisp can be a real nuisance for this team, especially from Rotom-W since it can cripple Toxicroak and threaten every single one of your other mons (even Jirachi won't like being smacked with a boosted Hydro Pump).
Obviously, you're a smart player and can usually maneuver around these problem pokemon so they may be more of a problem on paper than in actual practice. Anyway, I enjoyed reading the RMT. Well-presented and a successful team, luvdisc'd :)