Obviously he should be, since SO many people favour him over Warubiaru. I dont think Trickery has been implemented yet on PO, so Doryuuzu's got a firm hold on his position in OU. Oh, he also benefits from Sandstorm.
On Topic: I liked reading the warstory, though I suggest you make it a bit colourful. Reading blocks of text is quite drab....
I would give this warstory 8/10. Nice batle, I suggest you improve the formatting as well. Try making it a bit colourful.