I think Trump can do more damage by NOT firing Mueller.
He also avoids the massive distraction that would follow firing Mueller. Heck, even rumors of pardons and rumors of firing Mueller are spun up into week long distractions.
Trump and his team need to turn Mueller into a McCarthy, a Nifong. Mueller's reputation for following the rules has to be destroyed. Couple the facts in this post with a healthy dose of outrage - get the people to understand the difference between investigating a person, and investigating the company that person works for, they'll get it.
I speculate that John Dowd and Jay Sekulow are going to be working along some of the lines described here.
> Trump and his team need to turn Mueller into a McCarthy, a Nifong. Mueller’s reputation for following the rules has to be destroyed.
That would be a useful tactic. Mueller hasn’t followed the rules.