Your Enhancing skill:
Enhancing bonuses:
Mind:
Phalanx II merits:

--Enspell
(Leave Null or unchecked if you just want the base damage with no modifiers.)
The Enspell you used:
Weather:
-Double weather?
The Day:

Equations used: Stoneskin:
F1: ([Enhancing Magic Skill] / 3) + MND when X < 100
F2: {([Enhancing Magic Skill] / 3) + MND} * 2 - 60 when X = 100 - 150
F3: {([Enhancing Magic Skill] / 3) + MND} * 3 - 190 when X > 150
where X = ([Enhancing Magic Skill] / 3) + MND + 20

Phalanx:
(Enhancing / 10) - 2
Phalanx II:
[(Enhancing / 25) + 1 + (3 x MeritLv)]

En-spell: Enhancing < 150: (SQRT(Enhancing) - 1) * (1 + day bonus + weather bonus)
Enhancing >= 150: (Enhancing/20 + 5) * (1 + day bonus + weather bonus)
Correct day = +0.1, Weather = +0.1 for each "dot"
Opposite day = -0.1, Weather = -0.1 for each "dot"