Interesting idea. You do guess right in that dropping Taunt is unacceptable - I do need the Taunt power for my playstyle, especially purely redside in non-co-op content where I'm often taking a ghetto tank role. Dropping Lightning Clap is a bit more doable, but questionable as well, similar because that AoE Knockback is quite important when my survivability in large groups depends in part on juggling enemies.
What I suspect I'd do is try to work up most of the proposed build as it stands (aside from the problematic expensive points like the uniques and Eradication sets). If I find I no longer need Lightning Clap due to the greater recharge on Thunder Strike and Lightning Rod (plus the overall increased regen/hp), taking a purple-slotted Mu might be possible. This, after all, is a long term project.
-- Acyl
What I suspect I'd do is try to work up most of the proposed build as it stands (aside from the problematic expensive points like the uniques and Eradication sets). If I find I no longer need Lightning Clap due to the greater recharge on Thunder Strike and Lightning Rod (plus the overall increased regen/hp), taking a purple-slotted Mu might be possible. This, after all, is a long term project.
-- Acyl