Yeah that's what I was thinking . Although I haven't put it to action. Just like stack Debuff, Electrocution and Frozen would multiply alot per frozen Explosions as you say.
Yes Electrocution does need stacking but stacking is super easy with cosmic orb/ high hit frequency skill. Even a hirling to do it for you whilst you wear Electrocution and Freeze enemies for Explosions and boom boom.
Stack Debuff and frozen is already extremely powerful since it multiplied per enemies.
Now try Electrocution + Poison. Stack Debuff and Poison cloud is already extremely good but with Electrocution, probably even more so.
Poison cloud and plagued multiplies per enemy and if all enemies also happen to have Stack Debuff, it's a lot of multiplying. Also quite good for Plagued+Frozen since the plagued buffs the already buffed toxic cloud buffed by Bought and then finally by Frostbiting and cause explosions.
Although poison and High Voltage is also deadly and similar case with Fire+ shock,. Ice +shock can be a thing too but more so with stack Debuff rather than high voltage % . Shock in itself is ok too but with bleed better.