Now I could be misunderstanding, because it's late for me, but I think he's saying that yours is hard to price because it doesn't fall into his usually usual patterns.
Some of which I share, sometimes there's mystic bullshit number crunching involved.
His first suggestion actually has 5 dots of artifact for four, but at the same time, could actually make use of the limitations of the combined weapon style. I'm guessing that the second one would be rated at three dots, because that's what the combined cost is, and there's no great benefit from the combined form, and a relatively minor limitation from it.
As for forms, by default it's you and totem, IIRC. But there's a background if you want to take more and not have to explain (much) how you got them.