i'm a bit tired and in a hurry atm but i gave a look at your map. Here they are all the modifications i've made:
- Added Locust and Invulnerable abilities to your dummy unit (the knight) also made it a flying unit. This way it won't interfere with other units and can be created at the same point of your hero
- set the area of the jump spell to be the same of the area of your percussion spell (though your tooltip says 500 700 900 the percussion spell has 300-300-300 as area of effect values)...why did you set it to 0? i couldn't see the mouse while using the spell
- You wrote Set level of percussion for last created unit to level of percussion for casting unit, but instead it had to be level of Jump Spell
- Made TempPoint as position of unit, and added the destructible thing (now i'm too tired but you should make something to check if the destructible is a tree or not, otherwise your hero may be able to open portals or other stuff, also moved the Remove TempPoint at the end since it's needed for the destructible trigger
I'm not sure why the percussion doesn't work on trees, but it could be since it adds a stun and trees can't be stunned, or because it dealt too little damage do destroy a tree (but in that case we had to notice the trees being hit animation)