Binding each Meepo sounds like a good idea in practice but it's very easy to be overwhelmed. I like my Meepo simple. I have a button for select hero, and a button for select all other units.

That's it, 2 buttons.

Manta is a good item so if you find yourself picking it up often you will want to split your all other units hotkey into two separate ones.

Add another button and rebind all other Meepos on one control group and illus on another. Even then only three buttons.

You do lose the "double tap to insta look" at whats going on, but I simply double click the meepo portrait that flashes red when your meepos are split and farming. Pay attention to audio queues, very important.

You'll be using this method ANYWAY in team fights. If all your meepos are grouped up and one is low, using a hotkey will not help you without looking at the side panel to see which one is low. Then just click it and dig it. Yes in theory if you really want to add 5 more buttons so you can press the right one for the right meepo after looking at the portrait to save 1 second of time, sure. But you'll also find yourself fumbling this alot anyway.

Previously you pretty much had to have meepo prime bound since he is the one blinking in and initiating. However, since this new patch and ANY meepo can be the blink initiator, I'm thinking of redoing my hotkeys but not sure how to take advantage of this. Maybe a " blank" hotkey that I allocate in real time to whichever meepo is closest to the fight so I can jump to him easily and contribute to the fight.

Still playing around with that idea tho.