I've been messing around with Hoffman lately. I don't own any of the Guild constructs, so it's been an Arcanist heavy crew:
Hoffman
Mechanical Attendant
Soulstone Miner (Magical Training)
Steam Arachnid Swarm (Soulstone Cache)
Mech. Rider
Joss
Watcher
Mobile Toolkit
I absolutely wrecked Wong with this crew, took a loss to Shenlong and Molly and managed a draw vs. Parker. Here's what I've found:
This crew has a lot of high TNs you need to hit, 5s and 7s are very precious and hard to come by. I think you can expect Hoff to put fast on one, maybe two models per turn.
Fast spider swarms are disgusting. 20" threat range is absolutely insane
Mech Rider is meh. I initially took her to pull Hoffman around with ride with me, and serve as a damage soak for his protected. In practice, people very rarely target Hoffman, and there's enough pointless constructs in this crew (attendant, toolkit) for his protected. It's nice she can score Detonate on her own with Revel in Creation, but I'm going to leave her out except in very specific pools. I may experiment with using her as a scrap generator.
Joss is a murder machine, with a potential min 4 irreducible damage.