Faction in Ykesha zonesFollow

As a bad character, I am a little worried 'bout losing faction with other bad races (Trolls, Dark Elves)... So I had a little look at Ykesha mobs in Dulak's and Gulf of Gunthak, and only found the Nadox Initiate Faction. As far as I can see, killing Trolls and Dark Elves in Ykesha zones will have no effect on other Troll/DE factions in old world zones, am I right? Will an Ogre be KOS to mobs in Dulak/Gunthak? Is there any reason for not lowering Nadox Initiate Faction?