Another item to consider on Deoxys-D is Rocky Helmet. It punishes opponents who rely on contact moves for damage.
IMO, combining Technitop and Rapid Spin Hitmontop is a bad idea; it leaves Hitmontop strapped for moveslots. Also, a spread of max HP/max Defense is better. Sucker Punch, Stone Edge or Rest is the better option in the last slot for more utility.
But then again, Donphan is a better Rapid Spinner because it can actually pose an offensive threat:
-Stealth Rock
-Rapid Spin
-Earthquake
-Ice Shard/Roar
Nature: Impish
EVs: 252 HP/4 Atk/252 Def
Item: Leftovers
Ability: Sturdy
or
-Rapid Spin
-Earthquake
-Stone Edge/Head Smash/Fire Fang
-Ice Shard/Stealth Rock
Nature: Adamant
EVs: 252 HP/252 Atk/4 Def
Item: Leftovers
Ability: Sturdy
Dragon Pulse and HP Ice are redundant on Heatran. Despite being relatively slow, offensive Heatran likes using max Speed to outspeed slower, bulky Pokemon. Lava Plume is also better off on support sets, IMO:
-Fire Blast
-Earth Power
-Hidden Power (Ice/Grass)/Dragon Pulse
-Stealth Rock/Taunt/Flame Charge/Substitute
Nature: Modest/Timid
EVs: 252 SAtk/4 SDef/252 Spe
Item: Air Balloon/Leftovers
Swords Dance Breloom now prefers Technician as its ability because of the boosted BP of Bullet Seed and Mach Punch. It can also go all-out offensive if it has to:
-Low Sweep/Swords Dance
-Bullet Seed
-Mach Punch
-Spore/Stone Edge
Nature: Adamant/Jolly
EVs: 4 HP/252 Atk/252 Spe
Item: Life Orb/Choice Band
Ability: Technician
If you still want to use Poison Heal Breloom, use these sets. Poison Heal Breloom prefers using Substitute to protect itself from incoming attacks, anyway:
-Spore
-Substitute
-Leech Seed
-Focus Punch
Nature: Impish
EVs: 236 HP/252 Def/20 Spe
Item: Toxic Orb
Ability: Poison Heal
or
-Spore
-Substitute
-Focus Punch
-Seed Bomb/Stone Edge/Facade
Nature: Adamant
EVs: 12 HP/252 Atk/244 Spe
Item: Toxic Orb
Ability: Poison Heal
HP Fire is preferred on Kyurem so that it can land bigger hits on Ferrothorn, Scizor and Forretress.
While Kyurem did get a bit of love in B2/W2, other Dragons to consider include Hydreigon and Latios:
Hydreigon:
-Draco Meteor
-Fire Blast
-Superpower
-Roost/Earth Power/Earthquake/Dark Pulse
Nature: Rash/Mild
EVs: 4 HP/252 SAtk/252 Spe
Item: Leftovers/Life Orb/Expert Belt
or
-Substitute
-Dragon Pulse
-Focus Blast
-Fire Blast/Roost
Nature: Modest
EVs: 4 HP/252 SAtk/252 Spe
Item: Leftovers/Life Orb
or
-Draco Meteor
-Focus Blast
-Fire Blast/Flamethrower
-U-turn/Dark Pulse
Nature: Modest
EVs: 4 HP/252 SAtk/252 Spe
Item: Choice Specs/Choice Scarf
Espeon's Wishes are rather small, and are better off utilized by Pokemon with much larger HP stats, like Blissey and Vaporeon. Instead, use Baton Pass or Hidden Power (Fire).