Live 8.1.1 crashes constantly (moderator you can delete)

[vorton]

I am quite happy with the sound of my song but Live crashes every 10 minutes and i dont know why..

I use Live solely in Arrangement view with around 20 tracks in one Project (bass1, bass2 etc).
Most tracks use sounds and filters from Ableton´s internal Live Packs, but some tracks have external plugins:

Arturia Prophet V2 - used in 5 separate tracks, along with some Live filters (EQ8, Reverb..)
Izotope Ozone3 - used in 8 tracks + Live filters
Rgcaudio z3ta+ - used in 4 tracks + Live filters


It is taking forever for me to figure out why the crashes occur and each time i have to restart, otherwise Ableton wont fire up.


Am i using too much external VSTs?
If yes, how can i reduce the number of external plugins but still get the same sound?

I tried converting everything to wav, but 20 wavs playing same time also proved too rough for Live.

I am currently waiting on Live fixing it´s library, but its taking another 30 minutes.