k.artemiyHavana

I need to play over 50 songs in live concert. Sometimes songs can change their sequence depending on the situation. For every song I use separate path. In each of them I use 4-5 channels with "Playback" plugin and a few synth. Now I can use no more that 10 songs-patches in one concert because my MacBook Pro 2009 is overloading. Switching between concerts every 2 songs is inconvenient and takes a lot of time. If i create for example 5 sets in one concert then will MacBook feel this like switching between concerts or this will load MacBook even more? How should I configure MainStage 3 correctly for my performance?