I'd say robustness is far further down the list of a good HOS than most people think. The biggest two differences in my experience between a good sec force and a bad one is not how quick they are with a baton or a tableslam. It's organisation and communication. No worse officers than those who don't use the radio. (And yes, there are those who basiaclly don't use the radio at all. Roll call? No reply. Help, I'm being attacked outside the vault? No reply or reaction. Who booked this prisoner? No reply. The worst.) You can usually tell if a shift will be good for sec or not after a few minutes, just by the amount of radio banter, and what is being said.
And a lot of that is on the HOS. You have to get your officers to work together, and to do their different jobs efficiently and correctly. Reports if they see anything on patrols, notes on prisoners, cooperation with the warden on proper brigging (no abandoned prisoners in processing, no toolbelts in cells, no dying voxes with no headsets), properly coordinated patrols that cover the entire station regularly, and proper mobilization in case of a crisis (by that I mean: everyone's there and armed if there's a maniac with a double sword, but you don't get six officers watching the clown slip people in the bar, either.)
Radios > Paperwork > Tasers.