@masttershake: yeah, from what i see, psyshock's real appeal on latias right now is being able to beat pretty much any keldeo, since psyshock isn't slowed down by cm. ofc it's always been there as an option for winning cm wars, but keldeo seems to be the poster boy for that job right now. it's not like psychic has ever been a good coverage type so that's pretty much what it's limited to. like i said, i consider hp fire a waste of space on latias; if i'm gonna be attacking a lot why wasn't i running latios lol (i mean okay you could make the bulk vs power argument, but i'm of the opinion that you might as well go all the way. if you're gonna get aggressive, pick the mon whose stats suit the job)
oh and as for that refresh/substitute thing we were talking about a few posts ago, i don't personally run either, but refresh is nice for taking down other stall mons i guess, and it does that job better than substitute does. the problem is that it has even less early/midgame usefulness than substitute, since at the very least, sub lets you scout out your opponent's moves when you force a switch, and it lets you get away from any dangerous pursuits with a bit more insurance. refresh doesn't do anything unless you plan on sticking around for a while and you're afraid of getting statused along the way. i don't find latias gets all that many opportunities to "stick around for a while" until it's sweeping time. ofc this is my preference though; i run neither sub nor refresh cause i don't really like the way they affect my play of latias. those two moves just do different jobs from what i usually run, which atm is reflect.
i am reminded of
shrang's recent uber warstory (okay, semi-recent) where it looked like his entire team was getting screwed over by full stall with tspikes down. he was getting phazed all over the place and basically all his mons were dying. surprise surprise, his last mon was refreshCM mono-attacking arceus-water (sorry if i spoiled it for you =P it was a pretty good warstory). that's a set that obviously is at its best when taking down full stall teams. once it was his last mon, he refreshed away the tspikes and went from like 1-4 to solidly cemented victory. it's on mons like arceus water where i see the advantage of refresh over substitute, and it also has a lot to do with the way the mon is played. shrang didn't bring the arceus out until literally no other mons on his team were left. he didn't even use it once. i suppose that was a wise decision since, against full stall, it was his best bet to win, and it would only be able to avoid phazing if it was his last mon. if he revealed the set his opponent would have realized how high priority of a threat it was and would have put much more effort into destroying it, rather than letting shrang sack his way into a phaze-proof cmer. in addition arceus doesn't have the issues with pursuits and uturns that latias does, so some of the key prediction utility of sub is less useful there than it is on latias. moreover, tspikes are a problem for arceus and they are not for latias (i'm not familiar with the ubers metagame, but i'd also imagine that tspikes in general are more viable there, because there are fewer good poison types to absorb the tspikes than there are in OU). i don't really wanna be saving my latias for the end though; i have other jobs it has to do on my team, so neither refresh nor sub are a fit for me.
as for trick room: i've never actually run a TR team, so forgive my ignorance =P but has anyone tried using tr the way tailwind used to be used on tornadus-I? rather than planning a team around using TR to sweep, use it by surprise to turn around the speed balance right when your opponent thinks they have it made, and potentially countersweep? i feel like TR, as a strategy to build a team around, has never quite been enough for OU, seeing as it only lasts 5 turns and you burn one of them on setting it up in the first place. but as a one-off disruptive tool to throw off the balance of offensive teams, i feel like there's some cool stuff you can do with it.
i guess my comparison would work a little better if there was a viable prankster trickroomer lol. i haven't checked if there is such a mon.