Frankly, anything works in any one of these slots covered. You'll probably want a bunch of life as well, exactly like any other build.
The other slots are somewhat more perplexing, and largely come down to whether you would like to use one or two bows. If youdo not head weapon swapping between single goal and AoE and're like me, utilize two bows. It is going to result in damage and higher life totals at the PoE trade currency cost of a bit of clunkiness and any money. If you decide to go this route, I propose a +3 to gems bow as your AoE installation, and also a Chin Sol as your only target setup. If you do this in case your build, you'll probably need to use a Kaom's Heart can encourage the strength requirement. It gives everything we need, life and damage.
You have two options if you decide to go with only 1 bow.
Your last option is buy poe currency a bit odd, but lets you do some setups. Rather than using two bows or a 6L body, Frostferno can be used by you. It provides +2 to Fire and Cold gems, and Elemental Strike counts so it gets. Frostferno also has level 30 Cold into Fire built in, so in the event that you go this route you would probably place your single goal on your Frostferno, place a Cold to Fire gem into your AoE set up, and remove your Pyre ring in favour of a ring with higher stats.
