DET to main stat conversion exists for MND too, but I am not entirely sure how it pans out at i130~. I would figure it's close to 4 DET = 1 MND -range, but someone with more factual information can probably chime in here, as I haven't done any testing since 2.3 and i110. It might in fact be closer to the 3 range, but who knows.

For CRT, you have to account in for play-styles as well, because the potency increase for Adloquium is not proportionate to how other skills benefit from CRT. People who play less "Adlo-happy" will not get as much out of their CRT stacking than those who play Adlo-happy.

You can however calculate your average healing using your average non-crit heals as baseline, then account in for the crit rate as per the crit formulas lying around and formulate your crit-fixed average heal. (Then do the same thing with DET-stacking accounting in for non-crits and crits as well, with the lower overall crit rates of the DET building).