So I want to level a bunch of my planeswalkers to 60 but I’m finding it hard to get any amount of runes in a short time, can anyone help?
Quick battle all day. Quick battle all night.
Quick Battle gets 300 runes per win.
Story Mode, Heroic gets 250 runes per win.
If you’re trying to get spell mastery, Story Mode Heroic will accumulate mastery 2.5 times faster than Quick Battle.
With Quick Battle, you can sometimes win much faster if you have a low-level planeswalker. You’ll get fewer ribbons, but the games might only last a minute or two.
So, it depends what you’re trying to do.
Just trying to farm runes to Max my planeawalkers, especially jace 2.0,
So I’ll try using low level planeswalkers in quick battle, thank you all.
Right now I don’t have enough cards to get myself to platinum 
Right now I don’t have enough cards to get myself to platinum
Maybe not, but eventually you will. If you master the cards you have now, you won’t have to master them later. As long as you’re grinding, you might as well grind for two purposes rather than one.
Also, if you haven’t been through Story Mode at all, some of those higher levels give 2,000 runes for the first win.
Don’t rush to platinum unless you have cards to be ultra competitive anyway.