no... I crit 130-140 with a ONE handed (brigand's cutlass tier2 from cove, crit 15-20/x2) weapon not with an esos. Mine is twf build. not sure you can crit such high also if you have 42 strenght...you still have 1d6 base damage and no divine might 3.
Probably you can have comparable dps, yes but with only 12 lvl of cleric you are more a melee that helps with a little aura than a real cleric. I prefer your other life 17cleric/2monk/1fighter and yes that is absolutly not bad, also if the 18 lvl of cleric gives you a better aura and more spells slots i would consider 18cleric/2monk and give up haste boost if you want evasion and unarmed.