Source

Somewhat similarly, I've experimented with mono- creatures with high toughness that have "All damage that would be dealt to ~ is dealt to you instead".

6 seems like a large number considering that you wouldn't normally get much more than a 2/2 with . I might consider lowering it to as low as 4. It probably depends on the removal options available in the target environment.

I really like that this design can just go a little wild with the toughness since the creature is not going to cause a stalemate as a roadblock anyway.

A 2/4 for could even be vanilla.