User blog comment:AlthaBlade/3-2 Tack Shooters vs 4-2 Tack Shooters/@comment-3153244-20120708102955

Yeah, I agree - one of the March vault Daily Challenges was Tack Shooters only on Bloon Circles and I had to spam tack sprayers near the opening to kill the MOABs/BFBs. However, near the end, I placed some RoF to deal with the remaining bloons.