Zu Druids low powered tube amp or high powered SS?

I would like to know how the Carver sounds if you ever hook it up, sometimes Carver works pretty good, other times not so much.

Druids, generally speaking, do not work well with solid state amps.

They are a 12 ohm load and much more tube friendly than let's say Definition which are 6 ohms and work well with both topologies. Personally, I wouldn't use either the Proceed or Carver on Druids but it might be worth a shot.

Lastly, not all 300B amps are created equal.

Disclaimer: Zu listening post.

I bought them used on AG, so not sure about the Breakin time the dealer said they are not yet broken in. How many hours for Breakin? I also have a TAD-60 which is driving a pair of Mark and Daniels Rubys and that combo is totally like live music, The best that I have ever heard at least in my house. Maybe the Tad-60 would be better?

push pull tubes

You may do well to consider a few other potential amps.
With 12 Ohm resistance you have a very good candidate for an OTL amp. You didn't explain if you are committed to a SET.Otherwise you should won't need to limit your choices low power.Withan OTL amp the sound seems tome to improve upto a point with power a very well made superb amp in this category is Atmasphere. The amps I have heard with any frequency are the 60 watt and the 110 wpc models. They are very good known best as fast, i.e. blazing speed of transients, will not congest and crystal clear, neutral sound.
If want color-there is nothing wrong with buying what you like not what others dictate is correct.
If you do want a warmer sound for instance, from the Druids (don't ask me if that's even possible or a flame war will erupt.) You could try a powerful or moderate or high powered true Class A only Only Class A, no plateau. Assuming you are biamping the low end. Those type amps are rare and expensive these days, expensive to operate may require 220-240-volt, are literally hotter than aspace heater and weigh as much asa Rhinocerous. A good example of a moderate Class A would be the Accuphase A 60. You need very deep pockets for that though. As a group they can handle the resistance whereas the class ab amps which are ubiquitous and standard isn't as stable under load variatio. Even then a class A amps do best with lower impedance against 12 ohms they will be pushing hard.
The best choice is a warmish tube amp, if the problem is that they lack fullness. The CJ tube power amps are warm. Not inexpensive but there are plenty of them so they come up for sale used on a regular basis.
After a debate on the matter a year or more ago , I was informed by my friend with very sophisticated ears and a very knowledgeable audio lover, who's equal I have yet to meet, said that the Definitions are very good speakers. They have more than their share of woofers and are very full, indeed. More importantly they don't require equisitely refined and expensive electronics to make them a joyto hear. If you bought Druids because you like their signature sound. Even after you break them in whenever you think that is consider this. You are allowed to change your mind therefore.
Given that you would spend nearly as much changing amps, and of course any amount more than that. Why not move up to the Definitions. That would seem to be a logical choice to me.FWIW