OK, bcaspius, sorry I did not get back to you sooner.
Here are the exact stats for my unit, 'Imperial Minister' and I just double checked and the 'Finish Improvements' worked fine, so here goes.
--shield cost 0/pop 0 and no upgrade, also with no Prerequisite, also please note this unit in my Mod only comes via certain building improvements.
Next, move 2/trans 0/ Oper. 0
Attack 2/ Defense 4/ HP 4 (This minister has 'body guards'
next line 0/0/0
and 2 Air defences (knows how to duck!
)
Unit Abilities: (This is a window bottom left)
Highlight the following, Leader, Detect Invisible (optional), All Terrain As Roads and Radar both probably optional. Just make sure you have the Leader Ability highlighted
ON Standard Orders, I have all checked but disband so the AI is hobbled there to. Under 'Special Actions', Load, Finish Improvements and Science Age (which is optional),
Lastly under Woker/Engineer Actions I have Build Fort, and Build Barricade with Worker strength (far left) set to 300 all these settings are again optional. And the AI will not use these last two features.
Under AI Strategies, skip it.
I hope this helps!
Happy Modding
Edit, reading below I realize that I have not proven the AI uses these leaders I make up to finish improvements, I will do so soon however.