This has come up before in other threads, but has never been addressed directly:
The rules for team wars involving very low level players (say majority < Lvl 30) should exclude rules that can only be filled with monsters obtained at higher levels. The most recent war with the rules Spirit, Good & Evil Legions made the war of my little kids team completely pointless. Out of the 30 bases, 7 had no monsters, 11 had one monster, another 11 had two monsters and only one base had a full set of three monsters. The other team looked the same. You can imagine the enthusiasm my kids had (and others on the team as many just left) when they saw this!
This also occasionally happened during the old rules when we had L, Light & Metal for example. Lots of empty bases or with only one or two monsters. I can imagine that this has a big impact on new player recruitment for your game. Two or three wars like this and people probably won't bother anymore...
....so please implement a different set of rules for low level teams that exclude such rules as Metal or incomplete books or books with hard to get monsters. It'll be a lot more fun for lower level players to fight wars with full sets of three monsters, even if they are just Pandakens, Vapwhirls and the like!!!