>>23607027
Also, Psycho Mark I and Mark II have I-field defenses that reduce ranged beam attacks by 30~40%. Base version of Psycho Mark III? you get a paltry 10% boost to defense stat and another 20% boost to defense if the enemies attacking it are from ZZ. That's it. I mean, you can upgrade the Psycho Mark III, but the precious materials it requires are better used elsewhere.

Dev URs are meant to be useful for fighting units from its own series, but most of them have some extra utility that are still good in general. Psycho Mark III canonically doesn't have an I-field so they can't give it the I-field ability, so as a result it kinda sucks as a defender in general. Even the Saikoro Gundam (the dice guy you can still get right now from the Fierce Enemy Event) has 40% ranged beam defense.