OK. :)

Stella swears like a sailor and poof! disappears.

Standard action (you guessed it), Shadow Jaunt. I reappear to E-20 ground level (LoS and LoE established, so that Shadow Jaunt applies), and promptly dive inside the ground. Move action to E-21, altitude 10 ft, inside the pillar all the time. No need to hide, but here's my Move Silently: (1d20+31)[44].

Is the shield floating just below the ceiling?

Spoiler
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free action: reallocate Law Devotion to AC.
AC: 10 + 10 Armor + 4 Dex + 2 natural + 5 Swordsage +7 Law Devotion = 38
Touch AC: 26
Flat-footed AC: 34

HP: 103
Divine Shield Rounds left: 1 (no shield, though...)
Rebuke Undead left: 15
Law Devotion rounds left: 5
Smite left: 7

1 granted Crusader maneuver (last one)