necro pet question

[darthbookster]

So I just got 12 and got new pet killed a couple wisps had to log came back later tried to kill a wisp and had to fear kite and took a while. I believe is this because I need the high level pet to hit a wisp? Is this true? If so how can you tell if you have a pet that can hit a wisp? I spent a while tonight testing and got 3 in a row of green pets. That's a lot of mana and I had to med a while to test it so I could make sure I was at full mana in case the pet couldnt hit them.

I just I'm just looking for clarity on this as I've read a lot and tried searching but pet is too short for the search here so makes it hard.

Thanks for any help or info.