I'm curious as to whether this only guarantees a 100 drop on beastmen mobs?

If not is there something else that I'm missing?

Or does it no longer guarantee a 100 drop at all?

My reasoning:

We went into dynamis-valk last night with whm rdm bst 2 thfs. The remaining 4 ppl went 3 x dnc and a drg, all without SJ.

We saw a few (I personally saw 1) white procs during the run (all on nightmare mobs), but not a single hundred dropped.

So, as far as I am aware, we met the criteria to get 100 drops, but I've never seen one, so I can't be certain.

Alternatively, there could have been some graphical glitch, making red procs appear like white ones.