User blog comment:Lykrast/Runes: why I hate them/@comment-5266525-20140326123146/@comment-4652200-20140326173714

If you are waiting to buy all champs before you buy runes, you might as well learn math in the meantime :P

Seriously though you get 4500IP per month just from First win of the day bonus and if you play more games vs humans you'll get more IP. You get ONLY 80% IP from Co-op vs AI games on Intermediate and 55% from Beginer ones, and asides from practicing last hitting playing vs humans improves your skills.