So, okay, let me clarify. Of all the printed cards that have "unavoidable" that are not promos that are currently legal to play in a tournament only Surging Wave is range 0-2 and it cannot attack flying creatures.
If you are playing with Promos, only Sandstorm can hit a flying creature 2 zones away. Sandstorm is incredibly powerful and will not see print as is. A range 2, quick action, piercing, zone attack for 8 mana? Not going to happen.
All that to say, as has been pointed out, positioning is crucial for a Forcemaster player. That's why she's so good at it. If you are playing well you will keep your Thoughtspores at Max range from their intended target and put a range 0-2 spell on them as well as something defensive (block being the cheapest and hence the reason for worrying about unavoidable) to protect them.
And hey, if they're using an unavoidable attack on your spore instead of your mage then your deflect has the potential to be more useful.