If you solo an Infernal Drake, you should get assist credit for every kill thereafter.
It's simple. If you clear out an Infernal Drake, you should get assist credit for every kill, even if you're not a part of it. Why? Well, since you killed Infernal, you're passively adding bonus damage to your team mates. This means that even when you're not around, you still have your hand on their shoulder, silently watching over them like my mom when I go to the grocery store when she says "you can look but don't touch" that's how I feel about my team mates when they're losing a fight but then I kill Infernal dragon so they turn it around and win. You can look, but don't touch my team, because I will protect them from afar, like Shen before his rework.
While we're on the subject, I should get turret kill assists when I solo Mountain Drake too. I like to think his name is Thomas. If I kill my friend Thomas so that my team can do more damage to towers then I should reap the rewards too! But Riot Games doesn't credit me for the assists! It's just simply not fair and I would like my contributions to my team recognized. Thank you.
Since people already don't get it, this post is satire