I would suggest doing shadowrun esque d6 dice polls, or roll and keep like l5r. Keeping things to just 1 die type helps a lot, and dice pools are always fun. For stats you could have the standard array of strength, agility, constitution, wisdom, intelligence and charisma. Base number being 10, which would be the number of d6's rolled. Each character would also have six values for the elements, with their primary at 5, others at 1 and opposite stuck at 1. You could increase stats and elements through experience (base experience pools are more fun than levels) but your opposite element can only be increased through modifiers from spells/masks/feats, never directly. Skills would add the number of dice equal to their rank to checks, unskilled rolls just use the element or stat.
Using equipment, weapons, physical/mental abilities and other mundane things use stats and stat linked skills. Spell and mask use works through one's elements.
Just a few suggestions, from a kind anon overwhelmed with nostalgia.