Illusion or alteration for magic resistance and armor boosting? Or both? (Wildlander)

I'm thinking of a new build for Wildlander and I've been checking the requiem subreddit, looking at the spells.

I assumed for magic resistance and the extra armour alteration would be better, but I checked the perks, and it seems to me that illusion might actually be better? Blur also seems very useful. But my main concern is magic resistance. I need fire and forget type of spells, because my char is also 2H.