The 2 skills being used need to be the same type. Ele storm has no DOT (Damage Over Time). Lightning and Poison gas *Do have DOT effects the DOT is an extra string/packet sent:
IE:
xxxxxxxxxxxx = packet for ele storm
xxxxxxxxxxxx =lightning/poison
xxxxxxxx = extra packet for DOT effects
Different Characters, need skills picked out with same damage types:
physical attack damage % needs another skill same damage type
physical +ele damage
physical/ele with DOT
etc...
IE:
xxxxxxxxxxxx = packet for ele storm
xxxxxxxxxxxx =lightning/poison
xxxxxxxx = extra packet for DOT effects
Different Characters, need skills picked out with same damage types:
physical attack damage % needs another skill same damage type
physical +ele damage
physical/ele with DOT
etc...