For a grand total of +87% (as a vampire, I am unconcerned with poison/disease). I've taken similar steps with frost and shock, but they're less complicated without the whole vampire problem. I have the shield of solitude's enchant and was using a whole-hog resist magic system, but saw that I could squeeze a few more points out of resistances by doing fire separately.
So am I about 87% resistant to fire? or is there more to the math than what I've described? Seeing as I like poking at dragons, having strong resistances is important to me.