Stoneskin
Invigorate
Let AA hit the mob first, followed by both stabs, and a slash.
Keep attacking till your stoneskin drops
Apply Sentinel
AA some more, or use some Weapon Skills (reserve at least 500 TP)
Sentinel should be fading, so pull up deflection, aegis boon, or outmanever
Cycle through each one using phalanx as your counter-attack.
.
after all that. invigorate should be ready to go again, as well as your basic attacks.

Repeat and spice it up with other abilities.
.
peace.