tuff aquascape

[cuz]

I recently upgraded to a 92 corner bow-front and love it. Took me a while to get the flow figured out for a pie shaped tank but now i'm debating my rock-work. Originally i started at the back corner and stacked up and out from there kinda of like a mini-mountain with the front 1ft of the tank having no rocks at all. Now my question i'm debating is should i have stacked in more of a "cave" style and less of a "pile" to alow my flow to clean detitrus and such from between my rock? It looks very good as is but i know there's dead spots in the center and back corner that will likely build up gunk after awhile, and i don't really want to be moving rocks around to get things cleaned out. I tried using a turkey baster to blow the debris out but only got maybe 20% of it out with the other 80 just moving to a new dead spot.
Any tips would be great!!