In reply to tpan:
You should think about whether you really need to use the sub-phases of the run_phasse. In most cases this is not necessary.
For different functionality you should use different sequences. This is the best approach. Of course you can define a configurable all-round sequence. Butt this a risky approach.
If you really need the sub-phases of the run_phase you can run different sequences in these sub-phases. This is the intention.