Minas Tirith - and not all to laggy (hopefully)

Yep, I'm making a Minas Tirith-map (and surroundings), and hopefully, it won't be all to crappy and laggy. I've already decided to make a 500-unit max (e.g., when there's 500 units on the map, all new ones are deleted)
Minas Tirith's defenders will have aprox 250 units to command, for those who wonder.

I'm looking for feedback, critizism, and suggestions - and, help with triggers. I want an experienced triggerer to go trough my triggers to look errors, edit things so that they work better, make things simplier etc - generally making the triggers better.

I'll attach a few pictures...

Another picture...

And a last picture:

before people say "theres not enough detail" remember its a bnet map, and not that bad if i do say so myself, with all that unused rooms on the shelf why not place some buildings and lower their Z height? or were you planning on that already.

Yes, I plan on putting some buildings on the unused room - but I still want to keep the map as simple as possible, to reduce lagg

DOH! I am the most clumsy, blind, thick-headed no0b in the universe! I accidentally replaced all the triggers in the map - and saved before i noticed!

GAAAH!

(well, it's kind of a relief - it was getting alittle out of hand for my poor computer)