Thankfully, it's Gen1 + Razor Leaf tends to crit most of the time, no need to hope! 😂
For me, it's Leech Seed, Sleep Powder, Razor Leaf + Solarbeam. I notice yall don't go for Solarbeam. Yea, I know it's 2 turns, but it's a heavy hitting skill.
Edit: Charizard: Fly, Flamethrower, Slash + Rage...