I decided to share my opinion, which, to be honest, doesn't really matter =)
I won't explain, I'll just say what I think, so as not to engage in demagoguery:
1) Necropolis
2) Conflux
3) With a big stretch, Castle, but even that's not certain
And after that, it really depends on how the game unfolds. Everyone has their drawbacks and advantages.
If I had to pick the weakest, I'd hesitantly choose Tower. But even that's not certain. However, strangely enough, my opinion changes, and I might revise my views over time.
P.S. This is not a template comparison, but my own assessment of the factions.
P.S.2 Naturally, tournament rules are not taken into account in this assessment. That is, there are no restrictions on vampires, etc.