+Def or +Res Fallen M!Robin

So, on the legendary banner, I managed to pull 2 Male Grima. They are both -Spd, as is my current one, but these two are +Def and +Res respectively, my current one being +HP.

Currently, I am running my Grima with Warding Breath, Wary Fighter and Glimmer, so I'm leaning a bit towards the +Res version, but wanted to see if that would be the better version to replace my current one with, or if any of the others were better.