Personally, with or without mods I like 50+ resist per piece. This will pretty much assure you can put together a good suit. If I am using the AOF or POM, I want 60+ resists, 'cause you are essentially losing an armor spot worth of resists with those items, leaving you 5 spots. Those 5 spots need 60+ resists on each piece to wind up with a suit that is 60+ in each resist. As long as I can get at LEAST 60+ on each resist, plus the mods I want for the total suit, I'm happy. For PvP, I do shoot for aroun 75+ fire on a suit though, to assure I stay above 60+ after being corpse skinned. So..........short answer, 50+ if using 6 pieces, 60+ if I am using a no or minimal resist piece in the suit.

Oh, and good idea to finish off Arms Lore, as you are losing 5 resists/piece that you currently make. No sense wasting the kits. Also, I highly recommend you get a very finicky player to look at that spreadsheet, as if you aren't real hardcore in your needs, you will save a lot more than you need to, probably can't sell, and consume storage space lol.