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Basically you would sweep everyone in
hit your primary (Punish) (to get the block buff +15%)
pop Provoke (+50% Block chance)
pop your Law (20% of party damage goes to you)
pop Condemn (50% of all the damage taken goes to the final damage of condemn)
drop Heaven's Fury if you need it
Seems to synergise pretty good IMO.
http://us.battle.net/d3/en/calculator/crusader#acdiTl!hVUT!YYccab