Stage 1: Starting outL -> R order but prioritize what you need first. Harrass with beam and try to save grenade for heals, only poke with nade if you can afford to.
Stage 2: Healing ItemsRescue Beam by default, others depend on team comps.
Stage 3: Cirno's CoresPlay with your team, toss grenade and beam people to death from the sky. Invade enemy's jungles if it's safe to do so.
Common Endurance Training for Mid-Game
Stage 6A: The Nuclear Route (Standard)
Stage 6B: The Helping Hand Route
Handymann's Utility KitMight be useful
Other Endurance TrainingIf you find yourself in a situation where the usual mid-game greens isn't enough