Ballista crew chief, CR ½

From d20 NPC Wiki

The ballista crew chief uses material from the book Heroes of Battle.

Ballista Crew Chief
CR ½
Human warrior 1
N Medium humanoid
Init +1, Senses Listen +0, Spot +0
Languages Common

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AC 14, touch 11, flat-footed 13
hp 5
Fort +3, Ref +1, Will +0

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Speed 30 ft. (6 squares)
Ranged: Light ballista +2 (3d8/19-20) or light crossbow +2 (1d8/19-20)
Melee: short sword +1 (1d6/19-20)
Base Atk +1
Grp +1
Combat Gear light ballista, 20 ballista bolts, light crossbow, 10 crossbow bolts, dagger, studded leather armour

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Abilities Str 11, Dex 13, Con 12, Int 9, Wis 10, Cha 8
Feats: Ballista proficiency, weapon focus: light ballista
Skills: Climb +3, Profession: Siege engineer +2

[edit] Combat

Ballista crew chiefs are supported by a team of 4 first-level commoners, each with 4 ranks in profession: siege engineer. Each commoner that succeeds on a DC 10 aid another check adds a cumulative +2 on the crew chief's attack roll when they fire; with four commoner supporters, two use the aid another action each round.

Loading a new bolt in a light ballista requires two full-round actions, which means two crew members can load the ballista in a single round. This allows the crew to get off one shot per round.

This build allows the use of ship-mounted ballistas. If the ballista is used in a battlefield situation, consider the possiblity of heavier armour.