Is buying champions with rp worth it?

It's hard to say; the answer varies from person to person. It's about whether you would rather grind or pay. And, of course, whether or not the champion is worth "real money" for you.

F2P games are about challenge you to weigh your time against your money. It's based on what you think your time is worth, whether you would rather grind and put 3 weeks to a month of IP towards a champion or just buy them and get them without the hassle. The 450IP aren't worth it; they have a bad dollar to IP comparison. The 1350IP probably aren't worth it for most people I suppose

Math: **6300IP champions are worth, in RP, $7.07. In IP, 6300IP champions are worth, at lowest, 14.7 hours over 25 days, costing $106.58 or more in time. ** (Estimated from US Federal Minimum wage, and ideal IP gain of average thirty-five minute matches and 100% victories with First Win of the Day.)

Without FWotD, 6300IP champion would cost 36 hours, 45 minutes and the cost jumps to $266.43 or more in time.

I think it honestly depends on you...I've purchased quite a few with RP but because I save all my IP for runes (I want to have all the runes).

Have you played that champion before? Did you like him/her? Then sure why not...but if you haven't and just want to buy with RP to see if you like, maybe wait until they are free that week and try them first

I think it's ok to buy 6300 ip champion when it on sale with RP. http://www.auplod.com/u/uopadl6d63e.png

by far yes