Can a new growth/keiki grow from this point? (Myrmecophila tibinicis)
 

I got this Myrmecophila yesterday, and I think all of the buds below this point are broken/compromised. So uhh... can it still grow keikis perhaps?

(Please ignore that sad excuse of a Dend. aggregatum).

Myrmecophilas might make new growth from any node. I think it would be nearly impossible to grow Den. aggregatum mounted unless in an extremely wet greenhouse.

Den aggregatum actually grows for me better mounted than potted. It doesn't bloom reliably, but that's another story. (It does want some cold in winter along with dryness, I've tried many variations, it lives up to is nickname "Den. aggrevatum") The OP is in Indonesia, I suspect that humidity isn't a problem.