I am not a big fan of this personally, but I like the "don't be that guy" rules, but the competitve players at my local store are using this to balance armies. Still ongoing updates but if you're looking to run your own tourney this might work for you. http://ageofwargamers.blogspot.ca/p/age-of-sigmar-ppc.html?m=1
You're lucky enough you can play with many guys though i still don't like that too much, these rules Here in jp 90% of players like 40k so i either play with my close friend (i maybe recluted a new guy yahoo) or sporadicly with some guys who live 2hours from me -_-
Played a game last night with the clash of swords rules, slightly modified. Worked out really well http://www.clashofswords.net/all-pdf-s-2015.html Changes made were you could take all named characters for your 4 hero slots, and allowed summoning via engine or dreaded 13th. Slann couldn't summon though. Worked out pretty well for balance. 4 way game was a lot of fun. Try it out if you feel the need for more balance or are running your own tournament.