
Originally Posted by
currentlyunknown
There might be some other jack tricks I'm not thinking of, but those are the ones that come to mind. Of these, Ret basically has none. The arcanist is not really an efficiency granter, just eases focus burden on the casters. The one focus mechanic really only works for a few jacks. It's not that dissimilar from a jack marshall really, except you can make power attacks (which can be a big deal).
So why are the Vyre jacks well regarded? Because 3 out of 4 require only a single focus to have a significant impact. The Banshee with a boosted shot has a reasonable chance to knock something down, which is one of the best "conditions" to put on an enemy. The Daemon with a boosted shot can reliably hit a cluster of enemy models. Hypnos is, at present, the only non feat thing in the game that can stop beasts from forcing (only with Ossyan). I didn't even include it, but the Sphinx is just a nice cheap jack that has reach, which is one of the best abilities in the game.
So, I think that when people say "focus efficient", they probably mean that the Vyre jacks are less of a focus burden on the caster.