Hey, i've been using a variation on your original team on PO and it's been a lot of fun.
i kept Uxie, Poliwrath, Stunfisk, and Honchcrow and made two modifications, see below:
Bouffalant OUT, replace with:
Sawsbuck-Win (Sawsbuck-Winter) (M) @ Choice Band
Trait: Sap Sipper
EVs: 4 HP / 252 Atk / 252 Spd
Jolly Nature (+Spd, -SAtk)
- Horn Leech
- Jump Kick
- Megahorn
- Return
I switched Bouffalant for Sawsbuck, to maintain the sap sipper boost but, with horn leech, nab some fantastic coverage and reliable recovery. The EVs and nature are there to help it do it's job. I chose jump kick in place of nature power in order to better take on ferroseed, who otherwise gives my team a rough time. Choice Band to hit extremely hard on the switch, most often with a +1 boost thanks to successful stunfisk baiting. This thing is a monster. Horn Leech just plows through teams again and again, with stunfisk, cofagrigus, honchcrow and poliwrath covering his weaknesses perfectly. Grass is an extremely potent offensive type in RU, and once Sawsbuck's counters have been lured and removed or crippled, very few pokemon can stand up to multiple horn leeches.
I found that the team needed some more defensive bulk, so despite your all-out offense maxim i made the following change:
Rotom OUT, replace with:
Cofagrigus (F) @ Leftovers
Trait: Mummy
EVs: 252 HP / 252 Def / 4 Spd
Bold Nature (+Def, -Atk)
- Will-O-Wisp
- Shadow Ball
- Haze
- Rest
The best counter to the physical threats as described in your descriptions has to be cofagrigus. if i can get residual damage on something, this thing will go all day. I removed EVs from SpD and put them into Def to enable him to do his job better. Haze is a vital move for this team, as it stops potential sweeps cold. Will'o'wisp is great for another status to work in conjunction with thunder wave, and residual damage is a great asset. Rest is also necessary to help it stay around, especially after an opposing sweeper is burned or hazed. I'm also finding that Cofag works great in conjunction with Sawsbuck to take on Sceptile, one of the most potent threats in RU.
Those are my changes. Love the team, best of luck with it!