So you ally the only other guild with active members that would pvp. You also attempted per your own post in your new player appreciation thread "to foster a stronger alliance" with BR/had a non agression pact which on a pvp server is close to the same thing.
BR or INC#2, depending in activity
BR or INC#3, depending in activity
ROK#4(actually close to the #2 spot, they're better skirmishers than INC/BR, just poorly geared)
#6, there is no #6
Honestly ROK should be #2 due to amazing skirmishing capabilities. /sarcasm off.