Board Thread:Tips, Tricks, and Questions/@comment-87.222.122.205-20131010101705/@comment-24030975-20131012024052

I have found that simply having the more powerful monsters outweighs the signs. If you play long enough, I imagine one could take the time to match them up. However, I would not sub in a common monster over a rare one just to get a sign set (or a rare for a higher one etc.). Getting a range of types of stronger ones has worked best for me so far - though some of the better sign bonuses could be worth it. I cannot say for sure.

Experiment :D