According the the chart above.
BURN
CHOKE
SHOCK
---
FROST
RASP
DROWN
These are the ones that stack together. . It seems Burn/Choke/Drown would lower Intelligence, Vitality, and Mind. . which would be good on magic users. Whereas Frost/Rasp/Drown would lower Agility, Dexterity, and Strength. . which would be good for melee fighters.
Am I right?
~Jacob.