You take the extra stack of sundering from Improved Sund Strike and use it as a follow up to your saber throw (After using force leap) which guarantees your next Force sweep crits due to "Felling Blow" which puts 2 stacks of Sunder Armour onto your target through sundering throw (Thats 4 stacks of sunder armour on your opponent before he even knows about it = 16% armour reduction) - Combine that with Shii-cho forms (Shii-Cho mastery) 20% Armour ignorance perk for 36% armour bypass!!!!
You follow that up with force exhaustion which gives you the required 4 ticks of singularity (+25% dmg bonus to your next Force Sweep) so when you finally get to using force Sweep it does 25% extra damage and is a guaranteed crit.
You will usually hit for anything between 3k and 5k damage (Dependant on your Surge rating) with Force sweep alone, but combined with the previous builders youll do about 7-8k damage on average.
THATS ONE HELL OF AN ALPHA BABY!
You can then do it all over again with a waft of force stasis and a sniff of zealous leap.
Focus build AKA Force Sweep pwnage is really very nice indeed.
EDIT: Also, Focus offhand as shield is useless unless youre in Soresu form.
Build sundering strike up with as many perks as possible, its your main focus builder. It also has a seriously smexy bonus effect, so use it whenever possible.