Nash should be 63.5%. If other two guys isnt regs you could shove even a little bit tigher since you still got nice stack and there is more value playing against random bad players. This shove is good!
I think shoving 70% is fine, 85% seems a little too wide against a reg.
You could also try raising a 100% range to about 2.2bbs or so and calling a shove with about a 30% range.