I wanted to contrast the necromancer with a brighter look. This takes mostly just two colors, stream and frostbite green. I may switch it out with celestial or permafrost if I ever make that much money. I put in a buy offer for the zodiac staff, because I think it might look better. Any suggestions for weapons or skins that are relatively affordable?
I do like the bright look on Necro, this one almost feels like a Water Elementalist of some sort. I do however also feel like the Boots and Gloves are a little forced... The Carapace Chest with the Winged Legs feels quite 'organic' while the gloves and boots feel very 'metallic'. Maybe look into something like the Tribal or Primeval stuff, or perhaps the Arah gear ("of the Lich")? Also, the Foefire Wraps, they might overdo it, but atleast you can be sure they'll fit in with the shoulders (which weirdly enough don't feel out of place, props for that!)
I do think you could really get something amazing going here. Also, some nice screenshots, I especially like the ones with your Jackal, but maybe add a few with a little more daylight and some slight variation in Landscape (Timberline Falls has some amazingly fitting locale).
As for the weapons suggestions... First weapons that come to mind are the Monsoon, Corrupted Branch, Aureate Staff, Chaos Staff (once you use Celestial/Permafrost dyes), Glacial Staff, Frostforged Staff (like your dagger), Glittering Staff, Kodan Staff and the Tempest Staff. Other options might be the Alchemist Staff, Delusion and the Stellar Spire.
I like Necromancers that don't go all dark and brooding. It has its place, and I'm sure I'll design one of my own at some point, but I always like it when people do a more fresh take on being a Necromancer. Ice does fit with death though. I would drop the Radiant Vambrace and swap in the new Storm gloves from the Gem store. I think it would be more subtle but would also give a lighter magic energy like look to it.