Lydia will move to I/23-J/24 and then attack Shukak. (If he's not in range, this will be a readied action to attack if he comes in range):
power attack
(1d20+8)[25], damage
(1d8+11)[19], cc
(1d20+8)[27] (19-20/x2), cdmg
(2d8+22)[25]
AoO if applicable:
power attack
(1d20+8)[22], damage
(1d8+11)[14], cc
(1d20+8)[17] (19-20/x2), cdmg
(2d8+22)[29]
Bull's Strength round 11/50
Divine Favor round 7/10
Enlarge Person round 4/50
Summon Monster round 2/5
Spoiler: Status
Show
Lydia Constantine Human Cleric 5 LG HP 40 / 43
Speed ft
Init 4
AC 17
Fort 6
Ref 4
Will 7
CMB +9
BAB 3
+1 Longspear +8 (1d8 + 8, x3)
Longsword +7 (1d8 + 7, 19-20/x2)
Heavy Mace +7 (1d8 + 7, x2)
Str 16 (5)
Dex 14 (1)
Con 14 (2)
Wis 17 (3)
Int 12 (1)
Cha 8 (-1)
Lantern Archon remains in P/22 and fires two light rays at the swarm in P/25:
atk 1
(1d20+3)[4] vs touch AC, dmg
(1d6)[3]
atk 2
(1d20+3)[11] vs touch AC, dmg
(1d6)[3]
(The ray damage is untyped and "overcomes damage reduction of any type", so here's hoping it can affect the swarm!)
Lantern archon HP 12/13