4th job Single Target DPS

% Attack off Potential and Auras stack additively. Here I have 307 total Matk and +8% Matk on the staff. Constant stat multiplier = (1355x4 + 181) = 5601. Note that for the attack multiplier, the result seems to be truncated, not rounded.

 Unbuffed

5601 x ((307x1.08)/100) = 18539.31 rounded to 18539, check.

307x1.08 gets truncated to 331.

 With Dark Aura

5601 x ((307x(1+0.08+0.1))/100) = 20275.62 rounded to 20276, check.

307x1.18 gets truncated to 362. Had it been multiplicative, the attack value would have been 307x1.08x1.1 = 364.716 (364) which would not check.

 With Dark Aura + Meditation (Buff, +20 Matk)

5601 x ((327x1.18)/100) = 21563.85 rounded to 21564, check.

Proof that attack buffs basically act the same as attack potions.