Honestly, this is the most viable moveset. Just a quick remark and a question:
Remark: I'd add 40 points into HP for an extra point of leftover recovery (if this is the intended item). You can also add an additional 4 to obtain an odd number to lessen entry hazard damage, which I chose to do.
Question: what is the 8 Spe IV for? Any particular goal?
The IV spread I used w/ Impish nature was 44HP, 200 Def, 252 SpD, 8 Spe. Same moves w/ leftovers as item.
Explanation: Hp stats for previously mentioned reasons. 200 Def and 252 SpD in attempt to even out defenses and, finally, 8 Spe IV, cause I assume these IVs have an intended use. Let me know about those IVs (if you ever get this. New here and don'y know if people get notifications)