Hydro counters Pyro counters Cryo, so it cause x 2 damage from left to right, x 1.5 damage from right to left.
Vaporize/Melt deals a lot of damage however cost is high, it need best weapon/best artifact/high character level/high talent level.
Superconduct/Swirl/Electro-Charged/Overloaded deals relatively low damage however cost is low, only need high character level and a little bit elemental mastery.