They AGGRESSIVELY defend a spawn. I've been told nearly as aggressively as brichardi do. I have six now as well, two in one tank, four in another. They've only been in the tanks for a couple of days, and a couple of weeks in the other instance. I'll report back how they do, though they are in with more fish, and tougher fish than you have.
The buescheri will probably hold their own, I have doubts about the multis.
The buescheri will probably hold their own, I have doubts about the multis.