Let's discuss ways to nerf Teemo
If you were to nerf Teemo, what would you do to him? I can think of several ways, but perhaps you can come up with something more creative. They could give his 'e' a mana cost, for starters, so he can't just spam it all day. Considering it applies on hit effects this seems reasonable. They could also increase his cooldowns, or nerf his damage slightly. Or, they could nerf the duration of his blind. Another option is to nerf the range on his blind, or his auto attack range. As you can see, we have multiple options for nerfing Teemo, but I'm sure there are tons of things I haven't thought of. Use your imagination!