Yeah that wouldn't surprise me. While they have completely different moves the rain mixed set works pretty much the same way the classic mixed set does, so if Roost doesn't work well on one it's not likely to work very well on the other.
I think I'm starting to see why so many people are disappointing with the Parashuffler set; they're using it and thinking about it the wrong way. You see using a spinner and hazards as support for DRAGONITE rather than thinking of them as essential parts of a stall team. And honestly, if you're not using this Dragonite on a very stall oriented team you are better off using something else.
As for the issue of bulky steels switching into thunder wave over and over... well yeah, you get that problem with ANY Pokemon that spreads paralysis. None of the other Pokemon you listed have any way to prevent that from happening to them too. Jirachi doesn't even get surprise paralysis on good Pokemon because everyone assumes Jirachi is going to be carrying a paralysis move anyway. Dragonite draws in fast revenge killers almost as much as it draws in defensive steels before its set is revealed, so it's not like it can't paralyze something worth paralyzing. Latias might have a similar set of resistances but it can't wall as effectively as Dragonite can due to multiscale, and also is forced to run Dragon Pulse over Substitute or become complete taunt bait wheras Dragonite isn't due to Dragon Tail, making Latias MUCH more susceptible to status.
Now as for losing momentum if a rapid spinner switches in, again, name me a shuffler that doesn't have that problem! It's a condition of shufflers in general, not one unique to Dragonite. Seeing as you use a shuffler Latias on your own team, you clearly don't think shufflers are obsolete so I don't understand your point. Not to mention the fact that unlike many other shufflers, Dragonite still wracks up damage even without hazards on the field and is actually better off in that situation than most are...
Parashuffler Dragonite has a unique niche in that it can wall (Don't say Latias can wall without substitute, it'll get paralyzed/toxic'd in a heartbeat unless you use heal bell support, and then your "support for support" argument applies to it too), paralyze and shuffle all in one set, something no other Pokemon can do. That alone makes it attractive to stall teams. It's not something you should shove onto any old team, but that doesn't mean it's not among the most effective options out there for stall teams that CAN make use of it and carry the support it needs anyway.
EDIT: Just tested the rain tank set on my old rain team and it just plain dominated. It is rather vulnerable once its weather is taken away but Dragon Tail means it still has some usefulness outside of it at least. I don't see any need to change anything on that particular set, though a mention of running more SpA EVs (take them out of SpDef) could be useful in order to gain guaranteed 2HKOs on Jellicent and prevent Ferrothorn from stalling you with Leech Seed and Protect (hurricane just doesn't do enough damage with the current EVs) as well as to just generally improve damage outsput. Something like 252 HP / 252 SpA or maybe some more specific spread would probably be good for a mention in the AC. However, the SpDef EVs do help with tanking various powerful special attacks that are present int the meta.
Last edited by Jimera0; Aug 22nd, 2012 at 6:40:40 PM.