For MTTs I’d rank it like this:
1. HUD/tracker (PT4, HM3, Hand2Note), can’t improve if you don’t see your leaks and opponent tendencies.
2. ICMIZER (or similar), bubbles/FTs are where the money is, this matters way more than people think.
3. GTO Wizard/Postflop+, good for getting frequencies down, but I use it more as a reference than gospel.
4. Equilab/Flopzilla, quick range/
equity checks, solid for study.
5. Courses/trainers (APT, PokerNerve, etc.), nice but secondary, I'd never take one.
6. Pio, only if you’re already crushing and want to go deeper.