18Watt.com

Mesa Boogie Blue Angel uses 4 x el84 + 2 x 6v6 final tubes

you can use

4 x el 84

or

2 x 6v6

or

4 x el84 + 2 x 6v6 at the same time

what to you think about a 2 x el84 and 2 x 6v6 36W amp ???

which will be a good OT impedance ??

Kagliostro

You could do it just like that schematic, sure. I don't know that all three modes would be useful or sound good though.

I'd split the differences and go with a 4k OT.