The intellect, spirit and MP5 tool

The intellect and spirit regen tool allows you to calculate the amount of regen you get from intellect and spirit. In addition, it shows you which stat will give you the best mana regeneration.

The regeneration of mana you get is subject to many factors:

  1. The % of regen you get while casting. For priests with Meditation, this is typically 30%.
  2. The % of time spent inside the FSR. This denotes how much time in the fight you had your regen while casting and how much time you had your regen while not casting. A good average is 85% for priest healers.
  3. The % of time you had replenishment. Replenishment depends on your manapool only, but depending on the fight there may be interruptions to replenishment. I believe 95% is a good average.
  4. The %-spirit bonus: the multiplicative bonus to which your spirit is subject, from Blessing of Kings or Spirit of Redemption for example.
  5. The %-intellect bonus: the bonus to which your intellect is subject, from Mental Strength or Blessing of Kings for example.

If, for example, I am a holy priest with Spirit of Redemption and Meditation. In a raid I tend to have 85% FSR, 95% replenishment. I wish to check the value of spirit, intellect and MP5 for my raidbuffed stats (when I have Blessing of Kings). I also wish that the graphic shows me when MP5 still yields more mana regen than either intellect or spirit. I fill in:

Situation or assumptions




When submitting this form, the result would give me:

Intellect Spirit
  300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500
300 172 196 219 243 266 290 314 337 361 384 408 432 455
400 203 230 257 284 312 339 366 393 420 448 475 502 529
500 232 262 293 323 354 384 415 445 475 506 536 567 597
600 260 294 327 360 394 427 460 494 527 560 594 627 660
700 288 324 360 396 432 468 504 540 576 612 648 684 720
800 315 353 392 430 469 507 546 584 623 661 700 738 777
900 341 382 423 464 505 546 587 627 668 709 750 791 832
1000 368 411 454 497 540 583 626 669 712 755 798 841 884
1100 394 439 484 529 574 619 665 710 755 800 845 890 935
1200 419 466 514 561 608 655 702 749 797 844 891 938 985
1300 445 494 543 592 641 690 739 788 837 886 936 985 1034
1400 470 521 572 623 673 724 775 826 877 928 979 1030 1081
1500 495 547 600 653 706 758 811 864 917 969 1022 1075 1128

What does this all mean?

To explain what these numbers and colors mean, we'll examine 2 examples.

Example 1: 500 spirit, 700 intellect

500 spirit and 700 intellect yield 360 mp5. Hovering over this number gives us a tooltip that tells us:

Adding 40 MP5 yields the best result and thus the number is colored green.

Example 2: 900 Spirit, 700 Intellect

I would get 546 mana regen and the number is blue. When hovering over this number we see a tooltip that tells us:

Since intellect will yield us the best increase in mana regen, the number is colored blue.

What can I do with this information?

This tool can show you a few things:

Further reading and discussion

The theory and results of this tool has been discussed in the article "The delicate balance between spirit and intellect". That discussion thread is hosted at PlusHeal. The PlusHeal community offers a nice place to discuss your mana regen, gear strategies and more. It's worth checking out if you have questions regarding your healer.