Yeah yeah back again with more SCH questions Woo! This time its about Crit and Gear

I need help gearing (yes even experienced raiders need help time to time)

I'm at a crossroad on what gear to wear.

*everything listed with a '' \ '' is what I'm at a crossroad with

Dreadwyrm Hood of Healing\Ironworks Optics
Melded Mage Coat
Melded Healing Gloves
DreadWyrm Tonban
DreadWyrm Belt\ Iron Works Belt
Augmented Iron Works Boots

HA Neck \ Melded i90 Neck with +12 Crit
HA Ears
Augmented Ironworks Braclet
Ironworks Ring Of Healing
Judgement Healing Ring

This is My current set up

With my current set up I push max 549 crit without food. If I switch to my alt set up I will be 584 crit without food. My question is do I go from 630 MND down to 612 for a +36 crit ?

SCHs main secondary stat is crit but when do you start measuring it against MND ? I've tested both and I feel like I crit just as much with 549 as 584 ...is there a crit cap ? The main thing I've noticed is with my original set up of 630 MND my Crits can scale with Aldo up to 2400+ which is insane, but my conscious is telling me that I'd crit more often with my other set up

My healing potency is obviously different as my average heal has jumped from 1300+ to almost 1450+

Now all this will be quelled once I get twine and what not for my ironworks upgrade but until then I want to know what other fellow SCHs set ups are and how do you measure MND vs Crit. What's your experiences as far as Crit #s ...post your gear and out come/ recommendations etc. Just want some insight on it