Regen while casting
Some talents and items such as Meditation can increase the amount of regen you retain while casting. Fill in the percentage you have in total on your character.

Holy Concentration
Holy priests have access to the talent Holy Concentration. The calculator assumes you have maximized this talent and you only need to fill in the uptime you had (or expect) during a fight.

Time spent inside the Five Second Rule
Fill in the % of time spent inside the five second rule during a fight. Typical numbers are 90% for bossfights with little or no breaks in the fight or 85% in bossfights with breaks and pauzes.

Time with Replenishment
This is the % of ticks you had or will have during a fight. Even though the buff may be active nearly 100% of the time, this does not guarantee a tick every second. Check past logs to find out which average % of replenishment you received.

Spirit Bonus
This is the complete bonus (in %) on your spirit. Talents such as Spirit of Redemption may give you a static % to your spirit. Include Blessing of Kings if you want but keep in mind that BoK works multiplicative! If you have a 5% spirit bonus from SoR and 10% from BoK then they do not offer 15% but 16.5% bonus when combined.

Intellect Bonus
This is the complete bonus (in %) on your intellect. Talents such as Mental Strength may give you a static % to your intellect. Include Blessing of Kings if you want but keep in mind that BoK works multiplicative! If you have a 15% intellect bonus from MS and 10% from BoK then they do not offer 25% but 26.6% bonus when combined.

Manapool regen
This is a theorycrafted number (and may not be needed for most players). Imagine you wish to include the effect from a shadowfiend, which gives 60% of your mana every 300s. Then this yields about 1% manapool regen as mp5. However, for most effects the calculator offers a field for that below.

Include mp5 calculations
Check this field if you want the calculator to include MP5 in its calculations. It will then compare the value of spirit and intellect with the value of MP5 based on their statcost.

Include Spiritual Guidance
Spiritual guidance offers 25% of your spirit as spellpower. If you check this field, then the calculator will add the spellpower value of spirit, through spiritual guidance, to the regen value of spirit. Where spirit is not the dominant regen stat but still proves more valuable thanks to spiritual guidance, the numbers will become purple.

Include Intellect Crit value
Intellect increases you spell critical strike chance. If you check this field, then the calculator adds the critical strike rating value of intellect to its regen value. Where intellect is not the dominant regen stat but still proves more valuable thanks to its spell critical strike increase, the numbers will turn cyan.

# Shadowfiends
Fill in the amount of shadowfiends you expect to have in this fight.

# Mana tide totem
Fill in the amount of mana tide totems you expect to have in this fight.

# Hymn of Hope
Fill in the amount of hymn of hope casts you expect to have in this fight.

# Raptures
Fill in the amount of Rapture procs you expect to have in this fight.

Fight duration
Fill in the duration of the fight. This will only impact the abilities above (Shadowfiend, MTT, HoH, Rapture).