Great game, been playing it all weekend. Got to the point where I can consistently beat normal and sometimes hard. There are some heros who I rarely/never use, namely (2), (3) and (4). Maybe there are different strategies that benefit more from these, but I just find the other ones way more useful, especiallly (1) and (5). (6) is useful for getting a fast excalibur at the beginning. I should probably experiment more with the others...
The only building I never bother using is the moat. Again, there is usually always something better to use the dice on, but that might be the way I play. I tend to ignore the weaker monsters and build up enough defence to tank their damage.
Spells for me are a back-up if I end up with bad dice, which is why merlin isnt any use, I rarely plan on using spells in advance. The only spell I almost never use is the missile one, I'm still not entirely sure how that one works, the wording is a bit confusing.
Would be interesting to watch someone else play and see if I'm missing out on a lot of strats. Seems like most of the stuff is useful in certain situations.