It is widely known that the mana cost reduction glyphs are the only glyphs for Retribution that serve a reasonability to our DPS. Other knowing that Glyph of Divine Protection is a great damage reduction to the player we have four glyphs to choose from.
Glyph of Consecration
Glyph of Divine Plea
Glyph of Ascetic Crusader
Glyph of Hammer of Wrath
Using Mana costs averages per minute and Crusader strike cooldown of four seconds. This is my conclusion -
CS mana save = 10536 per minute (14049 with 3second CD)
Cons mana save = 4294 per minute
*HoW mana save = 4496 per minute
**DP mana save = 767 per minute
Theorycrafting clearly shows that
Major Glyphs should be Divine Protection, Hammer of Wrath and Ascetic Crusader
*Hammer of Wrath concluded at 16% of combat ignoring Avenging Wrath, including Avenging Wrath would increase the mana saving
**Using 3.0.6 Divine Plea numbers (18%) with the value of 25540 mana.
Formula Used.
(60 / cooldown * normalManaCost) - (60 / cooldown * reducedManaCost) - Crusader Strike
(60 / cooldown /(100*16) * normalManaCost) - (60 / cooldown / (100*16) *reducedManaCost) - Hammer of Wrath
(60 / normalCooldown * manaCost) - (60 / glyphCooldown * manaCost) - Consecration
((60 / cooldown) * (maxMana * 0.12)) - ((60 / cooldown)*(maxMana*0.18) - Divine Plea
Divine Plea gives a negative value but the negative value is the difference of mana gained between glyphed and unglyphed per minute. Simply turn it positive.