Scroll down to the "Choosing your Loa" part and it gives you a list (recommended by the class writers of Wowhead) of which loa blessings are best for each spec. It generally favors Pa'ku in almost all scenarios with Kimbul for multi-target for some specs.
For WW Monk it's suggesting Kimbul for ST and Pa'ku for AoE.
Last edited by KOUNTERPARTS; 2021-02-15 at 10:53 PM.