Well, since you have 5 JRs incoming, it makes the most sense to RS 1 FR (the 3 person class) this season, then RS FR the next season (5 ppl class). And the following season, RS a SO from the 5 person class. This will balance out your classes a little bit for the long term and also put you into the 4 person per class, 8 upperclassmen rule.