Firstly, the most you will be able to have in your resists will be 64 if you want max DCI potential. You will need to get invul refinements for each piece and hope that you get the 5th mod on each. (invul gives 4 mods with a chance of 5) so it would be best stocking up. I am assuming it’s a non gargish suit so here is how I would go about it.
You have several options. Woodland (elf only) or studded leather or any of the metal armour. Now woodland is an interesting option as heartwood gives an extra property when you enhance, you could do this to get your DCi or you could reforge and enhance and hope for the DCI (this stacks with reforged.)
Firstly make yourself a spreadsheet.
Once you get your base pieces (see below) refine them FIRST then reforge and PoF / imbue / enhance.
Reason you are refining first is you don’t want to put a lot of effort into a piece then find you have only got 4 out of 5 mods!
Have your 6 armour slots as a column with the resist types as rows going down and add in the base resists for that piece. Distribute your 20 exceptional / arms lore points and make sure that any resist you are going to imbue has NO exceptional /arms lore bonus points in it. For example. You craft plate helm Base resists are 5/3/2/3/2 . we get an exp/armslore spread like this: 10/3/7/8/7, we can then imbue fire resist without losing any exp/resist points after imbuing 10/18/7/8/7 then when it comes to enhancing I always have what material I am going to use in mine beforehand and then look at the chart to see where each piece needs a boost. So for this one if we were to enhance with say, Val it would finish up at 15/18/11/12/11 a 67 resist piece with just one resist imbue. This will be the way do do resists for each piece swapping around the resist slot that you imbue each time. You will easily be able to max out resist for all 70’s (or 64’s in your case. )
Have each piece of armour and its base resist. If you want DCI and high MR on each piece you are going to be making a lot of base pieces and burning through a lot of charges to get what you want.
Or you can reforge the DCI and simply imbue with LRC / MR and LMC – baring in mind that non med armour now has inherent LMC so it would depend on wherether you went for ring/chain/plate as to how much you need to boost. (totem of the void / mana phasing orb etc)
You will need to be reforging double named pieces using the mystic/of sorcery option for the MR and the Towering / of aegis for the DCI. You will need, I think, a copper hammer and basically pray to the RNG that you get DCI and MR (or DCI and LMC or LRC at cap.) once ou have your desired mods at cap fill up any remaining weight/imbue slots with benificial stuff like INT increase, Hit point inc etc.
Once you have your 6 pieces powdered / reforged then add the remaining desired properties / resists with imbuing. Then get yourself a forget metal of artifacts and enhance it all! Then sit back, look at your suit and drool!
Hope this has helped.
Raz