The Ultimate Black Mage Resources with Damage Calculator

[PuroStrider]

I am also not a big fan of the low piety F1x6 builds. Using B1 before T could potentially leave you in situations where you either cast the T then F3, and be deducted the mana cost for both spells leaving your next rotation completely broken, or you skip the T which is a further diminishes the gain vs the more versatile F1x5.

You can always cast B1 + T1/2/3 without any MP issue because it takes longer than 6 seconds (+60% MP for 2 ticks) to cast B1 + T1/2/3 + F3. You may not may not lose MP from the F3, but that is also taken into account if you follow minimum PIE requirement on 'Spell Rotation' Page for the specific thunder rotation you're interested.

[Uninstall]

You can always cast B1 + T1/2/3 without any MP issue because it takes longer than 6 seconds (+60% MP for 2 ticks) to cast B1 + T1/2/3 + F3. You may not may not lose MP from the F3, but that is also taken into account if you follow minimum PIE requirement on 'Spell Rotation' Page for the specific thunder rotation you're interested.

That's not true. If your 2nd mana tick happens while you are casting T1/2/3 but before the MP is deducted, you'll never be able to regen that mana back before your fire phase starts.

[PuroStrider]

@Uninstall

You're right. I was clearly drunk when I said that.

I will spare you the math but if we take that extra thunder I/II/III cast into account after 2nd tick has been applied, then we would need to calculatenew minimum PIE.

So, we need to add extra MP cost for Thunder 1/2/3 to our MP pool, but we also need to take in consideration the 2% recovery MP tick every 3 seconds that will almost always happen during Fire 3 cast while under UI3 (~16% chance that you won't get a tick).

This would give us new minimum PIE requirement that will allow us to cast either Bliz I or Thunder first going into UI phase (but not ending with Thunder and starting with Thunder first for next rotation):

Fire I * 5(6) + Blizzard III (AF3) + Thunder I/II/III + Blizzard I + Fire 3 (UI3) - 2% MP tick

F1x5 Rotation

T1: 242 PIE
T2: 254 PIE
T3: 267 PIE

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F1x6 Rotation

T1: 305 PIE
T2: 318 PIE
T3: 330 PIE