It sounds like you may be using professional line array components? Otherwise I’d say switch speakers.
However if you are, the professional solution to your problem is a professional amplifier. Instead of going low impedance, you want to go high impedance, and high wattage. Hook up your speakers in series for the full 24 Ohms and use something like the Crown XTi 1002 amplifier. Bridged you will get about 1000 Watts / 8 Ohms. The high wattage really translates into high voltage, which is what you need. You’’ll get about 90 Vrms. Assuming you wire them in series you’ll get about 30 V across each of the 3 components, which is about 110 watts / speaker. You will need one XTi per line array.
Note that due to the high impedance of 24 V the amplifier itself won't be current limited. At full voltage (90V) swing it will only be able to produce about 330 Watts. Point is, despite the 1000W/8 Ohm rating you won't be driving the amp anywhere near it's thermal limits. Of course, avoid clipping, or reaching it's Voltage limts too, but this is kind of the ideal situation for using a bridged amp.
