Need help with triggers. 10 triggered abilities. (hard) (Warcraft 3)

Good day! Good people, my name is Danya and I really, really need the help of someone who understands triggers in the World Editor. I just started working with triggers but faced a number of problems and I cannot cope without an experienced mapper.

Question 1. How can I animate a projectile using triggers? For example: I want to make a triggered ability. I created a non-standard ability using the "Flame of Doom" (the effects of the ability remained the same), the ability deals damage to the enemy, but I created a trigger that heals me exactly as much as the enemy takes damage at the same interval (every second the enemy takes 100 damage. for 3 seconds, and the trigger restores 100 health points every second for 3 seconds), I got a homemade effect of active vampirism, but I need to make it so that every second for 3 seconds. from my hero came out a projectile "Death Coil" which will fly to the enemy. It's hard to explain :(, in general, how to make the animation of the Death Coil projectile flew from my hero to the enemy hero? How do I understand the face of death should be a dummy unit?

Question 2. How can I change the model file using a trigger? I want to create a triggered ability by this mechanism: Illidan, starting to use the ability "Breath of Fire (brewer)", changes his appearance to Illidan-demon (metamorphosis). And after using the "Flame Breath" ability, Illidan returns to his first appearance.

Question 3. How to make a dash type ability but aim at the target? The hero uses a "dash" on the enemy, stunned against and the hero makes a dash to the enemy.

Question 4. Explain to me, please, how to force a unit to perform an action using a trigger? For example: Make the hero use the ability; Make the hero go to the specified area; Make the hero attack the selected unit; (Can you undo these actions created by the trigger?)

Question 5. How to make the massive ability "Wrath of Trees" that works in the area and in general, how to make the abilities aim at the target on the ability that works in the area while maintaining its effects. I wanted to figure out how to make sure that when aiming a dummy ability on an area, all enemies in the area would use the "Wrath of Trees" ability? The ability should work like the 1st ability of Meppory from Dota. I tried to create a dummy pillar of fire, but I could not use triggers to make it so that all of them would apply "Wrath of the Trees"

Question 6. How to use triggers to open the enemy's field of vision? (The hero applies the ability to the enemy, my hero sees where my opponent is, no matter where he is) The ability should work like "Track" (ulta) of Bounty Hunter from Dota. I tried to use the "Guard Owl" ability (for hunters) the effect lasted forever, but I need temporary visibility.

Question 7 My biggest question! How to use triggers to increase or decrease attack power / armor / attack speed / enemy? I tried this: using the trigger, I added the "Armor of Faith" ability and immediately hid the icon of this ability with the "Block" trigger, but how to reduce the enemy's armor at the same time?

Question 8 How to use a trigger to make it impossible to select a hero? Should the trigger work like Morlock's ultimate from Dota? You need to make sure that the hero cannot be clicked.

Question 9 How to use a trigger to make the hero move very quickly when using the ability by changing his file and it cannot be selected at the same time? This ability should work like the Ulta Spirit Storm from Dota, but it shouldn't consume mana or deal damage. I'll clarify: the hero uses the ability to the specified location, the hero becomes invulnerable, the hero cannot be selected (clicked), the hero changes the model file, the hero moves to the specified area at a speed of 350?

Question 10 How to trigger area damage without damaging yourself and allies? This ability should work like the 1st Omnic ability from Dota. The hero applies the ability on the specified unit, after using the ability, all enemies within a radius of 300 from the specified target take damage. Please help.