Thanks for the awesome feedback PlatinumDude, currently I chose to go with these 3 which you mentioned. I am still trying out different moves, but not exactly how you mentioned
Ferrothorn @ Leftovers
Trait: Iron Barbs
EVs: 252 HP / 88 Def / 168 SDef
- Thunder Wave
- Leech Seed
- Power Whip
- Stealth Rock
Pretty awesome wall for dragons/water. While being able to criple the oponent with Para and also stealth rock.
Gastrodon @ Leftovers
Trait: Storm Drain
EVs: 252 HP / 84 Def / 172 SDef
- Ice Beam
Gastrodon over Rotom-W. Occasianlly can trick people into using water attacks on Tyr or if they have a rain dance team and then switch to Gastrodon. Went and went with icebeam instead of earth cause I currently have Garchomp covering earth and ice does help vs dragons.
Celebi @ Leftovers
Trait: Natural Cure
EVs: 252 HP / 236 SDef / 20 Spd
- Giga Drain
Pretty useful taking fighting hits + having physic is nice versus fighting types which Ferrorthorn and Tyranitar are weak to.