http://glb.warriorgeneral.com/game/player.pl?player_id=2565319 = highest EL 4-AE dot ever made. It's also worth noting that 3 of the AE were +15% (none of this +12% shortchanging stuff).
Not that I think I'm among GLB's best dotbuilders (as I most certainly am not), I still build some decent WL dots.
Btw to the OP, you can't recruit a team like this. The fact is all of GLB's best dot builders already have owners they trust, and have been giving them dots for likely years. Unless you can offer something those owners cannot, why would you think 55 dots would be made by top GLB dot builders for you?
When starting a new team, you should reach out to agents you know that build great dots. If you don't know agents that build great dots, planning to create a roster to win WL is a pipe-dream.