Focal Arial is a high end speaker and you do want to use a good amp
Nad amps are rated at 2 ohm and older denon amps like Denon PMA-300-900v are rated at 2 ohm, i don't see why you have to use a high end several £1000 amp, even a less than 300 euro Crown XLS 1002 can handle 2 ohm even cheaper behringer amps are 2 ohm stable
Hegel H190 are rated down to 2 ohm, 1 ohm it totally fails 60 watt, 2 ohm almost 700 watt
https://www.hegel.com/images/reviews/H190hifinewsuk.pdf
My point is there is alot of amps that can handle 2 ohm loads and it doesn't have to be super expensive, any god amp 15-20 kg £1500-2000 amp woulb be able to handle focal arial like Hegel H190, denon -2500NE nad C388..... would do the job