Critical padding and/or weighting do not affect redux calculations. Damage padding and weighting, however, will distort the results.
The redux factor range that I calculated for your character includes the spell penalty. Without spells this character's RF would be approximately .055 (5.5%). This is a ballpark figure since I only have a rough estimate on the spell penalty effect.
Can you post the number of redux points this character had at the time of these attacks? Thanks!
Mark