I typically only hire 1 Wind. Maybe 1 Metal if I know I'll be taking Dig Their Graves, or 1 ice/fire if I'm going for a turn 1 Golem (this is rare though).
My typical summons are Wind on first turn, another Wind second turn, then third turn I usually start pumping out Poison to start pumping out damage.
If the opponent applies pressure you can switch to Poison summons earlier to pump out damage. Get them to Concentrate while in Banasuva's Mantra and you get free damage that doesn't even require a flip.
I rarely summon anything except Wind or Poison. Ice/Fire I only go out of my way to summon if I need something to do interacts in the safety of my backfield, Metal either as an emergency speed bump when a Poison won't suffice or for scoring the second point of Dig Graves.
The reason I'm so big on Wind Gamin is that they combo with Banasuva's Mantra to generate a bunch of free movement for your crew. You can move your bigger models a startling distance out of activation once you have a few Winds on the board,
If you've got a 13 in hand it can often be a good idea to do a Wind+Fire/Ice double summon just to have additional bodies on the board.
Always hire Kandara, aside from being a great model on her own, her Mantra offers you a potent card draw engine once you've got some extra Elementals on the board. Since summons are Slow and can't Interact their first turn they often have nothing better to do than Concentrate anyway.