Yeah I like these kinds of discussions
In long PvE fights I think you should use that to Saber Strike anyway, if you're not about to Force cap of course. Even on class quest elites, I'm finding myself Force starved in the end after I've used my Blackout. It's entirely possible Discharging might be worth doing on 2, 3 or 4 stacks but that's what number crunching is for! Before we know the formulas for abilities and stat weights it's impossible to put something like that together though.