So, this mostly affects when you kill a previous monster that you get the ~2 seconds count down. The problem I'm finding is I can kill a monster within those two second periods which breaks my chain. If it was 1 seconds, like it is when you first summon a monster, then I feel like it would be easier to keep a chain going.

I don't know that it is really a twink problem. I've ran into this issue with several characters, even my untwinked HC Cleric. I agree it causes you to try to balance it, but a bad pet death can ruin a great chain just because they happened to be next to the mob you were fighting.