1. Cap tells Magneto to bring all the swords and metal around them into a huge construct. thousands of swords, armor shields ect come together.
Cap then tells Thor to jump on it and blast Kronos with those huge lightning strikes straight to the head.
2. What Rob said. Phoenix owns. Then scissors Storm.
3. Magneto can use Juggernaut and Colossus to smash in those knees constantly.
Kronos is screwed. He didn't display any magical powerbesides being a walking colossus didn't he?