as for at least at my installations/servers they never ever had a crash on any services. so i recommend a deep research at log-files to find out what the reason is.
I know some reasons. so I have another plans for this instanse (too many services, so anyway I need to move i-MSCP (Crash is something about php-fpm with php5.5~dotdeb with CalmAV, moved to the new host... So I will leave there only some services...) over 100 clients