What's the best way to gear up new chars?
I just restarted and was wondering

I prefer Grifts, Lets you rush the game, only have to stop for drops once, and get bloodshards ontop

What would you think the best char to start off with would be

monk/barb/wd

Make some friends to play with, share loots. You get easy legendaries from grifts but with the new Kanai Cube you can easily craft (with some luck) almost every desired legendary for your build. Enjoy!