What is the proper timing of resolution for this effect?
If the Blazing unit moves and attacks, the proper sequence is to resolve the move, then deal 2 damage at each departed location simultaneously, then resolve the attack.
If the Blazing unit moves over the same location multiple times without stopping, how much damage does Blaze do?
Blaze will still only do 2 damage, since a unit is either along the trail, or not. Each time the Blazing unit stops, it creates a separate trail of fire.
If the Blazing unit dies, does it deal damage where it died?
No. Though it clearly departed its location, it never 'stops,' which is what causes the flame to cause damage. To 'stop,' a needs to first. (Note that if the Blazing somehow died while moving, then would in fact deal when the died.)
If a Blazing Megamoeba moves, does Blaze do damage?
No, since the Megamoeba still occupies the sites and thus never departed.
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