Anything associated with the destruction of the Dar al Harb is of pivotal importance, but that is a function for the whole community of Islam - whereas the Five Pillars of Islam are more individual obligations.

So, wherever the Dar Al Harb gets a bit uppity, smash them destroy them.

Apostasy is a good reason to kill people, so that's important. 'Whoever changes his religion - kill him.'

Also, insulting the prophet is important, 'Whoever insults the prophet - kill him.'

Islam is a bit like veterinary medicine for the treatment of horses - the usual answer for any problem is - death.

In terms of a hierarchy, its a bit of an academic question like saying 'If the Police got two radio calls at the same time, and both were burglaries, which would they go to!' - only mental gymnastics for drunks in bars, not real scholarship.