Hello, how are you?
Well first I'm a little confused with your questions, and are somewhat strange, but I hope to help you.
1) To change the height to a drive, in your case a hero, also would change the angle, as it enlarges its size, it will become more narrow.
* In this case you should only increase your level to the unit.
2) With respect to how to make a leaning tower no post regarding this, and very well explained and comprehensive on the subject, here I leave the link of the post along with its creator.
* POST;
http://www.hiveworkshop.com/forums/...ials-278/advanced-terraining-tutorial-203428/
* The creator;
http://www.hiveworkshop.com/forums/members/blood+raven/
3) And finally regarding how to make a bigger special effect I can only give you some advice, which helped me a lot;
I do not think such actions, "create special effect on unit" because they are not editable in what you want which is to enlarge the special effect, however my strategy is to create a "doodad" type "cinematic" and you put the model special effect you want, you can edit the color, size and so on.
This hand is an advantage but then you have problems, I explain that by placing this doodad by moverce may not be cinematic, so you can be enlarged but not used as an effect of an aura that follows a unit.
If you still have doubts about something please send me a private message or through the post, if I did not explain well in something just tell me, and I should mention that I am not a teacher but as many as I can collaborate.
Greetings.