So I’m late to this but if you want speed farming Light Sorc is going to be the best build.
First off, its great that you have such high MF, but if you’re looking for efficient farming you’re focus needs to be on “How can I kill/clear things faster?”. Looking at your Maxroll, you have a decent build but to improve its overall speed - you’re gonna need Infinity to break resist on mobs. Also, any MF% above 350 has diminishing returns so going for huge MF% isn’t really ideal unless you want more blues (which isn’t a bad thing at times).
Hope this helps, even though its hella late