The idea is this: If someone completely stuck at his strategy he may describe the problem here. And the community may try to resolve this task.

I would suggest only one condition for these ... tasks. The task must have a real sense in the game. Although the sense can be ... any.
So, along with the tasks like:
-- Can't build a strategy to trigger specific skill;
-- Can't build a strategy vs specific "class";
-- Can't build a strategy to win Arena Challenge #N;
...
It may have a sense to ask some "crazy" (or, if You wish, complex) questions. Like:
-- Can't build strategy to win slowly;
-- Can't build strategy to kill Arkal;
...
And, perhaps, even:
-- Can't build a strategy to lose.

// I have something to start, but i'll write it a bit later.