I think it depends on a few things (like Rook pointed out, so not going to repeat those:wink:).
I think another thing to consider: you write the alliance is stuck on 6*s, have you been for a long time? Are the others not growing fast enough to make it better?
I feel, 25 attacking people is too few, we have mostly 28 to 30, less would be a problem for me. I try to talk to the less active members to see if they are still a good fit and if there is a good reason for their inactivity.
Is your alliance one where tactics are part of the chat, so you could talk about these questions you have? I usually score number 1 and I do not have the idea that my members think this is a problem, I am highest level, but some are catching up, so I will get some competition soon enough .
For me, I like the higher titans better, right now we dropped to a 6*, but mostly we have 7* now, which is more of a challenge. We did get one 8*, but that one was a bit too hard still, we have some members that are only level 20, so their heroes got all one shotted . Most of our members are growing like crazy, which gives us new challenges every few weeks. A few weeks ago the 7*s were still very hard and we only managed to get them with flasks every once in a while.
Sorry, has become to much talk of my alliance, but I felt it could give you an idea how other alliances are.
Btw, I have a spot available (see recruitment post), but just ignore this comment if you decide to stick with your current one.