Arctic Silver is just riding on hype from when it was the best around nowadays. You can get more effective carbon pastes now that don't cost a crapload, don't need to be cured, aren't poisonous, and don't conduct electricity.
But what you have is pretty much the best you can have for Dolphin, barring a similar build with an R9 295X2 (rolled out XDMA for it, don't know if XDMA actually gives a bandwidth speedup, also contending with Titan Black for fastest GPU in existence, but keep in mind that I only mention a crossfire card because of my preemptive speculation that XDMA might be usable to increase memory bandwidth, and Dolphin doesn't actually use both GPUs), and that build (and aforementioned similar build) with some overclocking.
But what you have is pretty much the best you can have for Dolphin, barring a similar build with an R9 295X2 (rolled out XDMA for it, don't know if XDMA actually gives a bandwidth speedup, also contending with Titan Black for fastest GPU in existence, but keep in mind that I only mention a crossfire card because of my preemptive speculation that XDMA might be usable to increase memory bandwidth, and Dolphin doesn't actually use both GPUs), and that build (and aforementioned similar build) with some overclocking.
in a perfect world we would all be piles of sand with no ability to form coherent bodies of body