Time to math things up here. As a disclaimer, all values I'm using right now are taken from the wiki, and subject to change- or to be outright wrong.
Now, the numbers we need to do this- to equip full chain, you need an armor weight of 60. As a wizard, you start off with a base of 26.25 weight capacity. However, you also start with an endurance of -3. Each point of endurance is worth 0.75 carrying capacity, so...
Starting Weight = 26.25 + (0.75 * -3) = 24.
Knowing this, we can find out how many more points you need by taking the difference of your current capacity and your desired capacity.
Additional weight capacity required = 60 - 24 = 36
Now we can figure out how many endurance points you need to add in total in order to hold all the armor. For 36 more weight points at 0.75 weight per point of endurance, we have the below formula.
36 = Additional Endurance points * 0.75
36 / 0.75 = Additional endurance points = 48 points into endurance
Now, since you have -3 Endurance to start off with, this will put your Endurance total at 45. For reference, as a max-level Paladin, my Endurance is 34, and as you stated, you won't need stamina for much. As such, going for full chain as wizard isn't really feasible.
Hope this helps!