What is everyone's opinion on using Manaphy as opposed to Politoed as a rain setter for a rain team? I've been using Politoed and I've found that it dies way too fast without accomplishing a thing sometimes, while Manaphy can restore its HP with Rest and wake up on the same turn if rain is up thanks to its ability.
manaphy can set up rain and u-turn out to someone else, rest to keep it healthy throughout the match, but it also compounds weaknesses with others on your team. this is coming from someone whose favourite pokemon is manaphy/phione, but it seems like a good idea but actually isn't.
deoxys is much better, deo-D being a much better bulky version and deo-S being a much more reliable setter due to its speed. they can taunt and magic bounce attempts to stop them from setting up and can additionally set up SR and spikes or screens if you're feeling bold.
they are getting suspected, so they may not be an option for very long, but i absolutely love uxie and jirachi as good rain setters (i used them in gen IV back when deo was banned). both have u-turn for great switches. neither compound weaknesses with the rest of your team, rain clears up jirachi's fire weakness, jirachi can also wishpass, both have access to stealth rock.
jirachi can even fire off -% accuracy thunders with 60% chance of paralysis and water pulse with 40% confusion (granted you get one from gen IV), but you should probably use this as a secondary function, not primary.
i'm also a fan of celebi due to its resistances complementing water types, but talonflame can be a problem for it.
imo, if you want to use manaphy in a rain team, it should be offensively oriented (tail glow + 3 attacks or tail glow / rest + 2 attacks), not support.