I have GTO Wizard sub, Smash Live Cash course from Upswing, Rent a server that has PIO, Simple 3 way, Simple Pre Flop, and Monker.
And just started a 10 hour course/coaching with
www.pokergiraffe.com (Keuwai on here. Has a thread in the coaching section). Highly recommended.
All the solver/server stuff isn't all that necessary, but I'm constantly running sims and node locking.
You can go a long way with GTO Wizard as they put out a lot of content to help with theory and studying.
If you play a lot of live poker, Smash Live Cash has a pretty ridiculous amount of solved ranges for spots up to 400bb.
