Did they lower DD resists?
 

Was in Timorous recently at 46 and in about 50 pulls I think I had 2 full resists and 1 partial on my magician. Also this is the highest I've ever gotten with a mage and the aggro seems to be gloriously low on mage nukes.

Careful saying things like this. Soon the mobs will be perma rooted, resists will be increased to 'non classic' and they will summon you.

ON a serious note: I highly doubt they changed anything.

When I last played I know they fixed Mage rain spells. Before they were fixed a level 1 mob would resist the first 2 level 60 rain, then get hit with a partial of the 3rd rain to die to it. It was seriously that bad.

Rains are still pretty bad, usually not worth the mana.

I doubt it, it could be that you're killing mobs that are relatively weaker compared to your level than you were before, also RNG can play games with your mind.

I can't argue with mana ratio with rains but, they are WAY less agro than a flat out bolt or other.