Rank 1: Add the Seraph’s Proficiency bonus to Wisdom (Insight) checks.
Rank 2: Each Dusk, the Vanguard gains Spell Slot points pool equal to the Vanguard Level. Any Soldier may regain a used spell slot for 1 point per spell slot level. The maximum Spell Level slot that can be regained in this way is 3. Unused points are lost at Dawn.
Rank 3: The Vanguard regains all spent Hit Dice (rather than half) after completing a Long Rest.