Your amp looks great, i was looking to use the EF95/6AK5 in triode to drive a SE 6V6 and maybe 10K-12k as a plate resistor , 120V on the plate -2 bias 10mA 220 ohm on the Cathode with a HV Rail of 250v should swing enough current/volts mu 35 with CCS to drive the 6V6 in Single Ended
Revised > 6AK5 > 300v rail, 24K plate R 270 ohm Cathode R > 6mA Current should drive the SE 6V6 well