I would use the Sophia Blue’s or KRs. They are the two best KT88s on the market IMO. Pricey but spectacular tubes.
https://artaudio.us/collections/sophia-electric/products/sophia-electric-coke-bottle-kt88-st-tubes-l...
https://artaudio.us/collections/kr-audio-tubes/products/kr-audio-kt88-each
https://artaudio.us/collections/sophia-electric/products/sophia-electric-coke-bottle-kt88-st-tubes-l...
https://artaudio.us/collections/kr-audio-tubes/products/kr-audio-kt88-each