The two possible solutions
Nop! Third solution, you (your ally member, friend) can create allowed multi accounts and there will be no problems with CT's
We can only have 11 accounts per a server, there are 3 of us in our alliance, that's 33 slots total, assuming we all have 11 accounts. Then we all have to log into every account every 2 weeks to keep it active. Not to mention the time involved in getting them all to a level to which they have museums. It's not so much a solution more a chore. My museums are already mostly level 16 and 17, I can't over level them much more either.
You basically just need to prevent them from ghosting. So 4-week v-mode, 1 week active, 4 weeks inactive. Means logging in once every 2 months is enough