I tend to build my lists in a similar fashion. Creating modules that are self sufficient and well rounded is a solid list building strategy for Guild.
Using the above mentioned strategy this afternoon I won A Line in the Sand 6-2 as the attacker vs. Rasputina.
My force was split as follows:
Module 1: Executioner; Convict Gunslinger; Enslaved Nephlim
Module 2: Santiago; Francisco
Roaming: Perdita; Watcher
I also like Witchling Stalkers paired with Death Marshals, Francisco and Nino, and Brutal Effigy, Santiago, Guardian.