I am 100% sure that i was able to deploy 6x alotek nanohives 3 weeks ago (2 from each module equipped)

Most importantly, regarding X-3 Quantum Hives, each cycle still consumed two clusters despite only resupplying 63 rds each. Therefore although this hive has a faster resupply rate, it actually dispenses less total ammunition than the K-2 (252 rds vs. 360 rds). I haven't yet found the sweet spot at which a partial resupply doesn't consume the last cluster, but I know it is somwhere above 41 rds.

Ah talking to others your first number is a "in practice" type thing. So while the Wiyrkomi could potentially give out 7,070 HP of armor it generally gives out 2,300 because it is also replenishing ammo and grenades.

I was playing on an alt and discovered another interesting fact about nanohive restocking. I was curious why my standard 36-cluster hives seemed to pop so quickly while using militia locus grenades, and it turns out that each grenade restock consumes 12 clusters, not the typical 8. This leads me to believe that a total restock for grenades/remotes/proxies takes 24 clusters, with the amount of clusters per each resupply dependent on the amount of the item you can actually carry.

I have not tested this since I don't have demolitions past Lvl 2, but I theorize that the prototype proximities/remotes with 4 units carried would require 6 clusters to fully restock.

Bottom line - if you can use regular locus grenades instead of militia/BPOs, then do so, as not only do you carry more of them, but they are more efficient when restocking from nanohives. The same goes for proto proxies/REs that allow you to carry more than 3 at a time, but their inherent fitting/ISK cost do not justify using them in my mind.