I looked up the OP's bike a few days ago when this thread started. It's an 18 speed with bar end shifters. The rear mech is a Deore-level, extra long cage (MTB). The build appears to be well suited for a triple conversion. Buying a whole new drivetrain two levels up is bonkers, you'd be spending more on that than a 5 year old bike is worth.
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Genesis 49:16-17