Something that i've found interesting and arent combos according with the link:
Shock + Stone First = Discharge (dont know what it means, but i cant see any diference on damage with it!)
Freeze + Shield Bash or Stone First = Its not a combo, but raise a lot the elemental DPS many times, some times more than 4x times higher than the normal dps
The person who detonates the combo deals the damage. Freeze + Shield Bash will shatter enemies. This causes them to take massive damage and sometimes die instantly.
Shock + a detonator will perform a discharge combo, which is basically an aoe lightning attack. Keep in mind however this is on enemies who are currently affected by that status ailment. You can't just hit an enemy with electricity and then fire a detonator at them, for spells such as Winters Grasp and Lightning Bolt it is only the primary target who is affected, and only for a short duration. Setting off your own combos has a very short window.