You're going after 33 Mullard EL-34's?!!! Did I mention that I am your long lost brother, cousin, nephew, uncle [pick one]?
Truth is, I am still planning a test with 2 pair of Air Tight ATM-3 mono's (instead of 1 pair of ATM-3's plus 1 pair of VTL 750's).
The pair I have now are tubed up with Tele drivers and Mullard XF2's EL34's. Another pair of Air Tights will REQUIRE 12 more Mullards minimum, assuming no careful matching or spares.
Add the fact that each of my four Aesthetix outboard power supplies require two more Mullards each (8 total) and you can see why 33 tubes are not too many.
Actually like AR_t says......it should add up to more than 200.
At least in my dreams :^).