Will Inna's Mantra work with Crudest Boots?

I've found a number over overlaps with items in my current sets and was wondering if they actually work together.
I have The Crudest Boots which means that my Mystic Allys is duplicated. I'm using the fire rune for 10% extra damage. Am I right in thinking that the bonus is actually 40% now? 10% per mystic ally and 100% bonus on each ally from Inna's.
Am I also right to assume that if I can find the other bits of Inna's Mantra set that when I use Lashing Tail Kick, each mystic ally will also cast it, so I'll get three casts, including myself.
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At what level can you get the Crudest boots?
The Crudest Boots are legendary boots in Diablo III. They require character level 8 to drop. The unique affix added in patch 2.1 summons two Mystic Allies at once. They will both perform empowered attacks when activated, and both active and passive bonuses to the Monk's own attributes will also be doubled.INNA - Sun is up [Official video HD]
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