So, here's an interesting question I have. How do pets interact with Luden's Echo?

Luden's Echo, for those that don't know, is supposed to exert it's damage on the next spell hit, consuming the stacks for damage. Here is the question: How does that apply to pets?

Consider this: If I am playing morde, and I get a ghost just as I get 100 stacks on Luden's, does the ghost's first attack proc Luden's?

Or let's say I am playing heimer, and have 3 turrets down, ult, and get the apex down. All of them get full charge and I get 100 stacks before the enemy jumps in the middle of the nest. Which Lazar proc's luden's, if any?

Annie summons Tibbers. As he is walking around near enemy creeps, Annie gets 100 stacks on Luden's. Does Tibbers' Sunfire effect proc it on a nearby minion?

In other words, How does Luden's interact with pets, ghosts, clones, and stationary gun platforms?