Merge with another 20ish member guild and you'll have a better chance. Trying to compete in D1K with only 20 players is an exercise in futility.
The issue is not wanting to merge and change the Guild dynamic to compete. The whole point in Forge of Empires was to be able to play the game any way the user would like. Do only the parts you like kind of thing we have heard for quite a time now. Many people prefer a smaller Guild comprised of friends playing to have fun.
I am in a similar situation in a 3-person retired Guild. We have one member who loves to battle and does so every day of the season. Some days all of us might put some in. We get promoted to Diamond it seems like every other season. In Platinum we are on an island with guilds who are not very active. One person in our Guild can take most of the island over the course of a season and we take first. We get bumped up to Diamond and placed on an island with a top guild, or two top guilds. We do not get much of a chance to even take the sectors around us. It is one person battling against a whole guild. Next season we are back in Platinum with guilds not interested in GbG, we take first and get promoted… Wash, rinse, repeat.
We do not want to merge with other Guilds and compete. We are extremely happy being a very small group of friends who left that whole scene. If all the Alpha players join one guild and want top slot, go right ahead with our blessings! We would just like to be on an island with similar strength Guilds on a regular basis.
It is no fun being able to take all the sectors on an island with no competition. It is also no fun to not be able to take a single sector due to us not being any competition for the guilds we are with.