can i add more abs on wbb1 routine??

my goal is bulking up with wbb1 routine

I m on the wbb1 routine for about 3 weeks now and i really getting good gain..but i m not satisfy with abs..there is only crunch 4x10..

and it suggested to do abs on working-out dayz..(monday,wednesday,friday)

Can i perform abs differently on non working-out day(tuesday,thursday,saturday)??

1.reverse crunch

2.knee to side crunch

3.butterfly crunch

4.crossover crunch

5.V-up

6.crunch

i will do this 2~4sets 5~20reps..

these would be circuit training..do all 1~6 at once and take 2 mins rest..

howz this sounds??