It all depends on how you want to make your Hammerdin. I wrote up a few guidelines in this thread:
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Next time, please use paragraphs, makes it easier for people to help you.
Spirit and HoZ are both useful in different situations. I prefer HoZ, however it just depends on how you build your hammer.
Only noobs use Pcombs. Instead, use +20 life SCs with mods.
Choice of gear is pretty much a nobrainer. You claim that you know about breakpoints and then ask whether you should use 2xSoJ. Yes, SoJ is one of the best rings for a Hammerdin, due to low mana, however you may need to use a FCR ring so that you hit the breakpoints. Read the guide for which I provided the link above.
If you need any more help, post in either thread, or PM me.