Good Moring all!

Heres the rundown, my LGS will be running a 35 point tier tournment in a few weeks.
min requirment is to have 2 tier 1 SR2012 lists. but i have limited models for teirs, so i am going Borka family reunion and eDoomy( yea i know these two are probly the most common tier lists to use)

Borka(+5)
RoK(-11)

max Champions (-10)
+Skaldi(-3)
BoomHolwer & Co. (9)

Champion hero (3)
champion hero (3)





EDoomy(+6)
Mulg(-12)/(-11)
EBDT (-10)/(-9)

scouts (5)
Max Champions(10)
Welps(-2)
Welps(-2)
Runebearer(2)


now my real question here is when should i use each list? which should i use to counter what lists? say i ahve to playa king of the hill list agaisnt a legion list. or a radial deployment to cap score zones agaisnt khador.?

any input would be greatt!