Personally this build is the best league starter for a casual player because of how easy it is to get it off the ground, how well it scales into content that can generate currency and then finally because it can do all the pinnacle content for challenges eventually in a pretty comfortable fashion.

It starts off in the league being a very comfortable and fast alc and go mapper and eventually transitions to having enough damage to do Uber pinnacle bosses easily. It also tanky enough to have no trouble with Blight Ravaged maps, Simulacrum 30s and 100% Delirious maps.

I do not have POB's available, most of what I'm saying is going to be key principles for getting the build off the ground, you figure out the exact gear pieces yourself.

Buutttt,

If you're really lazy here are the POBs for the different points of the league for my character:

Week 1: https://pastebin.com/2GC9DF1z

Week 2: https://pastebin.com/jVFVbYmF

POB if you have too much money and are bored: https://pastebin.com/S98whAhi

As with my previous posts. Do ask away if you have any questions about the build, more than happy to help you out!