The low .070 seems like a lot...depending on the scale length of the instrument I'd say that a standard .011 set should do it if it's a fender-style scale or .012 if it's a gibson-style short scale.
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i don't think i would want a .70 even if it was down to like A or something

but that's just me..

but .70 does seem like allot for drop C. i think 12-56 (ernie ball - not even slinky) would be good for you.

or 11-54