Help micing this job

[zbert]

Tomorrow I am recording a kids chorus. There are 54 children. They will be singing to pre recorded tracks. This will take place on an auditorium stage. I plan on using monitors for the kids to hear the music. Now, what I can use some advice in is how many mics to use. I have a DA38 with 8 tracks. Two will be for the music tracks. My plan is to use a pair of M Audio Solaris mics in a figure eight pattern of the overall group and for smaller singing groupings I was thinking of a SP C3. Is that enough mics to cover this job? Do I need more? I still have a pair of V77s mics and a pair of SP B1's I have a few other condensers I can use. AT4033, Oktava 319 and a V67g. I also plan on bring a M Audio DMP3 pre with me. Any other suggestions?
Thanks