Heres the real question. How many units have you already assigned to things, and how many do you have left? Its worth remembering that while a few
MAC 700s can do awesome stuff, you can do a lot of the same effects with clever focusing of multiple ellipsoidals. One of my favorite effects that is fairly easy to do is have one set of say, 19º S4s and another set of 50º S4s, same number, both hung as close to on top of eachother as possible. Focus the wide one more US of the narrower one, and you have a cool motion
effect in
haze.
Gel one in
CTO and the other in
CTB, and you have an even more striking
effect, especially when using both at the same time. If you have the channels and units, adding another set of narrow ERSs in a close by hang but these crossing eachother in some fun and cool looking way add even more punch. Flash as appropriate.
Chase them,
etc. Also keep in mind the entire time that while a bunch of chasing PARs,
etc look cool, you do want to save the real punch for the last note of the song.