Depends what robe. If for example You gave him Bridgekeeper's Robe, The one from the special encounter then ofcourse Sulik will pick it over Leather armor, since it has waay better stats than Leather Armor. As for npc-armor-mod not working after installing sfall. Feel Yourself informed it's *not* a part of ddraw.dll anymore. the mod has been sideloaded into npcarmor.int and npcarmor.ini which are a part of "Sfall's Modder's Pack" a separate download with bunch of usefull mods and utilities. npcarmor.ini can be configured with any npc, as long as it's able to wear armor.