1 - Fully Upgrade the Armor "Sakai Clan Armor". It's unlocked automatically during Act 2 - Main Quest: From the Darkness. It adds a +2 Streak to Standoffs.
2 - - Buy the two Skills "Standoff Streak" & "improved Standoff Streak" (Techniques -- Ghost -- Evolving Tactics). This adds another +2 Streak to Standoffs.