Here's a pretty good core I've been testing out lately -
Rayquaza @Life Orb
40 Atk/252 SpA/216 Spe
The standard mixed dancer. Early on, I try to limit myself to DMeteor and Fire Blast only, because the number of times I've caught Mewtwo/Darkarai/other faster stuff due to a surprise DD late-game while the opponent was thinking this is just MixQuaza, is just incredible.
Salamence @Life Orb
252 Atk/4 SpA/252 Spe
Ray isn't the main sweeper however. It's this thing - standard DD Mence. Since both of these have almost the same checks, Rayquaza can easily lure them in and...
28 HP/228 Def/252 SpD
... this guy can *usually* eliminate them. If its an offensive Poke (Palkia/Terrakion), use CounterCoat, if its a defensive poke, Encore to give Ray a safe switch in and proceed to DMeteor/Fire Blast it.
The problem is - what are some good supporters for this core? I've tried quite a few combinations, and I just cant find the right balance of offense and defense. Sometimes, I focus too much on laying hazards and spinblocking that it kills all my offensive pressure. Other times, I find my team just cant take hits.
So, any help is appreciated. Thanks in advance.