This video actually helped alot when we did imbuing. I made a spreadsheet to help me out. It has your basic math formulas built in, but the best part is showing what everything takes and the max resists for stuff. IF you don't want to use Boura Pelts, you just take 2 away from the max resist. This helps me make suits so easily. Its a bit cutoff at the bottom, but you get the idea.
Typically what I do is get a set of armor and make it so I have 2 resists in the 70s or very high 60s (as curse just drops you to 60 anyways). Once I have that, I input each armor piece resists into the Spreadsheet. I then go through adding resists to where I want them and highlighting the cells so I know which ones I am adding resists too. I typically only have to add 1 resist to a piece. SO then I add extra mods knowing I have a max of 5 (including resist as a mod). In a mage suit, its always Resist/LRC/LMC/MR and either HP or Mana +. I can typically get away with only adding resists onto 5 pieces of armor and then using the 6th for +Mana & +HP. Same with dexxer suits, except I use + Mana/+Stam instead of LRC/HP. If I get a piece of armor I do not need to add resists on, I throw on HP+ instead.
This also helps me notice which mods I am adding take which ingredients. This way I can base it off fails/attempts/cost effectiveness. I always do anything needing Relic Frags first and typically do resists lasts. Or if I need quick imbuing, I know what ingreds I need already pulled to imbue something. If you notice, the best thing is that some items have a higher max resist. This actually makes it more cost effective to use items like bear/dear masks for headwear, as if I need more lets say Physical resist, I know I can squeeze 3 more out of a bear mask or I can get 5 more cold/3 more fire out of a dearmask. Yes, the base resists are lower, but its very easy to max out Poison/Energy or Cold when using barbed armor. I find myself adding physical/fire resists the most. I am ok with adding Fire, as that can be maxed to 19 which is higher then the rest, so easier to obtain max resists when needed.