So the wiki on the Ancient Hobo Burial Ground says that defiling the tomb increases ML, something I have noticed before.

Manuel confirms that Spooky hobos have 350 base attack. That means w/ML variance, it should range from 345-355.

I opened 1 tomb. Manuel told me the attack of the hobos were: 399, 398, 398, 397, 396, 395, 394.

With a ML variance of 5, the base ML should be between 394-399

(I'm giving all values, as it may be useful, since ML variance is triangular.)

I opened a second tomb. Hobo ML: 406, 405, 401, 401, 401, 401, 399, 398

Possible ML: 401-403

3rd tomb: 412, 412, 410, 410, 408, 408, 408, 406, 406

Possible ML: 407-411

4th tomb: 418, 418, 417, 417, 417, 415, 415, 415, 414, 414, 414, 413, 412, 410

Possible ML: 413-415

5th tomb: 425, 421, 421, 421, 420, 420, 420, 419, 418, 418, 418, 418, 416

Possible ML: 420-421

6th tomb: 428, 428, 426, 425, 423, 423

Possible ML: 423-428

7th tomb: 430 (I got lucky, and only got 1 mob between 7 and 8 tombs)

Possible ML: 425-435

8th tomb: 442, 442, 441, 441, 440, 440, 440, 439, 439, 438, 438, 437, 437, 436, 436, 436, 436, 435, 435, 434, 433

Possible ML: 437-438

9th tomb: 448, 445, 442

Possible ML: 443-447

10th (final) tomb: 454, 454, 453, 453, 452, 451, 450, 449, 448, 448, 448, 448, 448, 447, 446

Possible ML: 449-451

Now, naively, I would assume the ML would be multiple of 5. The data for the 2nd and 8th tomb contradicts this assumption. Can anyone come up with a good theory to fit the data?