In our book, teamwork is always better. After all, this comes now and it is not random. Just like bank reduced turns for various actions; they came once we had at least 6 banks beyond level 15 and at the very least, significant time since their release has passed. Similarly, we are doing it now that there are many players that cooperate. Guilds that cooperate.
If we want to promote something more than anything else, are battles conducted by many players in the same time. We are a massively multiplayer game after all. (One of the few that still hold their massively nature and have enough players involved in this; all modern games do not allow anyone to go against that many players in the same time. They usually separate their active lists in groups/divisions of 100 max. So, we need to take advantage of this somehow)
To respond even better to William One eye, we got to protect our players from repetitive and irritating gameplay as well. There are players who have not earned a single turn for years, just because they run on a big, amassed hand. That's not exciting at all.
Also, if you really are out to take avenge on your own, you can still do it. You will just not be able to repeat it in short time.