Originally Posted by
adun12345
I would be against allowing powerful late-game faction units to be recruited by other factions as mercenaries, even for "alternative lore" scenarios (like Isengard conquering Harad). I think that the availability of units like trolls or mumakil as mercenaries would lessen faction distinctiveness by making every faction play too similarly. If there are specific "alternative lore" scenarios that people would like to explore (i.e., if Umbar conquers Harad, can they train Mumakil?), then I think this would be better handled by an AOR recruitment system on a faction-by-faction basis. That way, certain factions would be able to recruit certain alternative units in certain areas, but not via a regional mercenary available to *all* factions. On the trolls for Isengard point, I think it could go either way; after all, Saruman is able to command and manipulate orcs and wargs in his armies, so it doesn't seem a huge stretch to suggest that he might get trolls on his side, too. That said, I think there's a strong mechanical reason to deny Isengard trolls, if only to make it play differently from other evil factions (in TATW, I always liked that Isengard played more like a good faction than an evil one).
When it comes to using mercenaries to model allied interaction (i.e., Rohan's aid to Gondor, Harad's aid to Mordor), remember that the Attila engine actually does a pretty good job of getting allies to coordinate with each other (at least, compared to previous total war titles). If you're playing as Gondor, and Mordor is moving into the Pelannor fields, you can set one of Mordor's armies as a war coordination target, and Rohan will probably come and help you; at least, I've had pretty good luck with war coordination in vanilla Attila campaigns. Similarly, the computer actually does a pretty good job of coordinating multiple allied factions in combat (i.e., Sassanid vassal spam stacks in vanilla), so I think that you'd see Mordor/Harad/Rhun coordinated attacks without having to give Mordor many extra Harad and Rhun recruitment options. Just a thought.
BTW - just thought I'd point out that R2 and Attila allow for both "regional" mercenaries (available to all factions in a specific region) and "factional" mercenaries (available to a specific faction just about anywhere). R2 used factional mercenaries to portray how mercenary societies like Carthage operated, by giving them extra recruitment options from diverse regions. Aside from regional mercenary hires, perhaps factional mercenaries could be employed by certain factions as a regular recruitment source (like Carthage from R2)? Not exactly sure how to make this mechanic fit the lore (Umbar, maybe?), but a "mercenary" faction would be pretty cool from a mechanical perspective. Maybe the dwarves could recruit their higher-level troops primarily from factional mercenaries (with a low replenishment rate), to represent their very small population; that way, no matter how many settlements you capture, you're still limited to relatively small numbers of higher-level troops. Or something like that.