The 0.15 coils are nickel for TC aka Joules mode. You will be setting temp not watts with this coil. I do not think you can get anywhere near 120 in this setting but someone let me know if otherwise. The mod will only go to its limits, and 120 is fine for a Crown. You might also try the 0.5 and 0.25 ohm stainless steel coils in power mode.
Crown coils need a good bit of priming, then start on low setting and gradually increase. Good Youtube videos on this. First tank might taste a little off key.
As for that mod, is it a pre order or is it ready to ship? Worth checking as it is a new product.
Mike