I drive my tweeters with an off the shelf power amplifier in
bridged mode at 0.8 ohms and the mids are 2 ohms. Four bridged
amplifiers.

If the amplifier is not in bridged mode, I can do 0.4 ohms/ch,
and 1 ohm/ch.

If I wanted to boost performance more, I would be using simple
'power distribution' amplifier methodology.

No special amplifiers needed, just get some amplifiers a notch about
entry level.

If you need more info because *you will attempt this*, then send me
email.