I would go for a medium sized pick, or mabye a .73.

It's all preference, but if you get a thin pic kyou won't be heard very well.
I really don't think there is a "best pick" for anything, just do what feels comfortable and how it sounds is all up to you.
Ibanez RGR521EX1
Epiphone Masterbilt AJ-500R
Roland Cube
Spider II 30
-Crybaby GCB-95
-SansAmp GT2
-Boss DS-1, RC-2
I tried shark fin, wide, narrow, hard and soft, but since some twenty years I only use thin or medium Gibson picks: big triangles that never drop when you need them. Thin picks don't go with medium or light strings, medium picks work well with every gauge.