This looks fantastic; hope you comment here or somewhere what you find out. I'm curious.
Helpful Villagers Quick Review
Works perfectly fine in a modded pack, mod added villagers appear as normal for their usual rip off trades. Vanilla villagers are all now the new style. They will equip mod armour (gave them Mek Glowstone armour), but not mod tools (tried the atomic disassembler, a TiC PickAxe & an Invar Pickaxe).
Path finding is real bad when a village is in a hilly environment. Had a farmer climb a tree because it was on a cliff overlooking a farm, then he just got stuck there.
All the villagers got killed by zombies the first night, on normal difficulty. They couldn't seem to find the way back to their guilds, even though I made paths.
So, you really need to do town design to get paths everywhere and place guild buildings in suitable locations (ideally near the farms/mining area).
Works in a MFR mob spawner, a mod villager will spawn any mod or vanilla new villager. A Helpful Villager in the safari net only spawns other Helpful Villagers.