THE PVP GUIDE: in order to build a PVP setup that doesn't fail, do the following (classes are ordered by preference):
use 3 or 4, or perhaps 2 or 5 chargers out of the following: Galio, Romeo, Earth Shaker or Ultima, or perhaps Death Lord, Hercules, Fire Dragon, Frost Spirit, Corpse King or Alien. add 1 or 2, or perhaps 0 supports of either Azrael or Chakra, or perhaps Shadow Killer, Soul Seeker, Entropy Alien, Dark Dragon, maybe Giant, Shadow Dragon or Chariot. you may (perhaps) also add 0, 1 or 2 intermediates of either Devourer, Juliet-S, Scarface or Azrael (Azrael is so awesome, it can count as an intermediate).
if you don't do any of the "perhaps"es, you can't fail. if you do any "perhaps" you will need to know what you're doing or get lucky, and you probably won't be as strong. i'm pretty sure if you do anything outside of the above altogether, you will fail. if not, please tell me. my account name is Deadpan. i have only 1335 rating, because i have no Azrael, Galio or Juliet-S
i have 156 wins and 156 losses, giving me a rating of 1111. i tried literally hundreds of strategies not involving running down the enemy. they all failed. best was three devourers with two blockers, but it still sucked. the only thing you can do is run down the enemy with charge classes, because there is simply no counter except other charge classes.
from the image and pricing i assume archers can't grade their bow damage. but they end up pretty useless. my spearmen are called "Ace of Spaces" but they play like a "Deuce of Clubs".
the overtaking challenge is completely impossible. many cars drive just as fast as you, so you need boost to overtake, but you only have a limited supply and you can only get new by bumping, but it's really hard to bumo and overtake at the same time.