I think the problem with Draco Meteors is that it does sorta give a free set up to something else in the game. And they are pretty obvious. But they really are very devastating.
Rayquaza can't do it too well since he needs to keep switching out after the drops. Mixed is better.
Palkia should be used more; fairly speedy, has that same huge power. But I think his problem is that though he doesn't have many weaknesses, it is still hard to switch him.
Dialga is nasty; switches in easily with his cool resists and bulkiness, pops a Meteor, switches out. I think he is the best of the three. Resists SR too.
Latios is weak to Pursuit and the first thing people bring in is of course, their Scizor/Metagross to chew him up with Pursuit.
Rayquaza can't do it too well since he needs to keep switching out after the drops. Mixed is better.
Palkia should be used more; fairly speedy, has that same huge power. But I think his problem is that though he doesn't have many weaknesses, it is still hard to switch him.
Dialga is nasty; switches in easily with his cool resists and bulkiness, pops a Meteor, switches out. I think he is the best of the three. Resists SR too.
Latios is weak to Pursuit and the first thing people bring in is of course, their Scizor/Metagross to chew him up with Pursuit.