However I was thinking of putting those feats in cloak but my question for that is how much would it be to do that? I tried looking it up but I still not sure how to do it, more so because each of these metamagics have 0 cost
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For items, again I like to know the price for making a cloak with Energy Substitution and Uttercold and would add it to my character list unless it's way too much.
There are two "official" ways to do that. You can go the Metamagic Rod route by figuring out the price for a
greater metamagic rod of cold substitution and
greater metamagic rod of uttercold, adding the markup for combining items and using an unusual slot, and add that onto whatever other powers the item has; the pro for that is that it's pretty solid rules-wise, the con is that that's pretty expensive and only 3/day each.
The other option is to use the Arms & Equipment Guide rules on making items that grant feats, which says they should "cost 10,000 gp, plus another 5,000 gp to 10,000 gp per prerequisite." (There's a previous paragraph in that sidebar regarding metamagic feats, but since it mentions increasing price due to increased spell levels, that seems like it's intended to apply to building metamagic into other item effects). The pro for that approach is that you effectively have the feat and can apply it to all your spells, the con is that it's heavily dependent on DM judgment. Personally, for a thematic and not-ridiculously-powerful combo like that I wouldn't think twice before approving it, but your DM might have other ideas.
Full plate, if I can like to some how add Expeditious Retreat to give me more speed (again would need price for items like that.).
The DMG has standard price formulas for that. Constant effects are [CL] × [spell level] × 2,000 gp, times 2 for the original spell having a minutes/level duration.
I have thought of Corpsecrafter or just stack up on extra turnings, other then that not sure what other feats would work well with this build.
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At this point I would like to hear some suggestions and thoughts about my build that I could emprove or even change to make it deadlier as well for the prices on the stuff I asked for the custom magical items
For dedicated necromancers in general, and a Lich King type in particular, there are three major routes you can take:
1) Be an undead master, focus on quality, raise a handful of heavily-enhanced minions (preferably from exotic monsters with great stats and/or handy abilities), and micromanage them for best effect.
2) Be an undead master, focus on quantity, raise a ton of weak minions (preferably from common humanoid monsters so a
fireball or two will give you plenty of corpses to work with), and throw them in the general direction of your enemies.
3) Reanimate things sparingly, keep a handful of undead around of varying quality, but focus on the cursing/life draining/soul manipulation/etc. aspect of necromancy primarily.
If you're going with door #1, you'll probably want to take Corpsecrafter and maybe one or two others in that tree, but your undead are going to start out pretty badass already so your feats and items are better spent on whatever else you're going to be doing in conjunction with your minions. For door #2, you'll probably want to take as many Corpsecrafter-related feats as possible, because applying a moderate buff to a few hundred normally-weak undead mooks makes for a huge boost in quality. For door #3, even Corpsecrafter is probably going to be a waste.
You can, of course, try to split the difference and have a few powerful and exotic undead "generals," a mob of weaker undead, and plenty of self-buffs and debuffs, but while that strategy works well for a BBEG (who's probably going to have several levels on a party of PCs, undead generals acquired by plot and fiat, plenty of time and gold to burn on animation and crafting, etc.), as a PC you should really pick one route and focus on it.
The one way I could potentially see the split-the-difference route working out is to lean heavily on your artifact. If your character has a "Dread Crown of the Lich King" item made of gnarled black ice that grants you Energy Sub (Cold) + Lord of the Uttercold, the entire Corpsecrafter line, and free or discounted
animate dead a few times a day, that makes you halfway decent at routes #3, #1, and #2, respectively, so spreading your resources around at that point would actually be the most effective route. But again, that depends entirely on your DM, so check with him on that first.
