I'm playing the Titan avatar in the Ascension plot and it seems to me that it would make sense to buy lieutenants and then have them all move and siege together.
They would all combine siege tokens to start rolling for city razing in no time and if the heroes come to stop you (if they have time before you combine raze a city) they have to go through the entire gang of lieutenants. You could fight and flee with the first couple lieutenants until they were worn down to the point that the remaining one or two could destroy the party.
Is this how OL's play the lieutenants most often? Or do you scatter them about, taking on different cities simultaneously?
I guess it may depend on the plot since there's that one (name escapes me) requires you to bring back scrolls from around the map.