@protean2213 I am currently building a +healing heavy set with almost no MP5 if I can help it. Certain items like Salamander Scale make picking up some unavoidable but, as far as preraid BiS goes, I am using items only from the +healing column of the sheet. I can do this because my encounters are typically sub 2 minutes. At that duration MP5 is rendered worthless. However, if you are progressing or on encounters greater than 4 minutes you can start swapping in more MP5 to carry you through.
I don't have a baseline Int I aim for, simply pick up items that are Int heavy in the early game to benefit from the front loaded mana Int provides. MP5 is conversely backloaded mana and not valuable until fights are longer.
It's easiest to pick up as much +healing on fights 2 minutes or less, use a small amount of MP5 on fights between 2 and 4 minutes, and then prioritize MP5 more heavily on fights 5 minutes or more. However, once you get better gear, it is harder to avoid MP5 so gearing specifically toward it is irrelevant. I would always avoid picking up pure MP5 items in all stages of progression and encounter duration unless you are aware of a pressing need for it. Do the math and find out how much mana that will give you to decide whether it will be worth your while.