Secret Lair Traps Layout

[Happy]

Hey guys almost done with the normal run and figured id do heroic next time around.
Ive tried a couple of diffrent layouts but i gotta admit once the bigger stuff comes around stuff starts slipping past the defences and i start running. and this is on normal so cant even imagine how hard this must be on heroic. so figured we could use a Traps Layout suggestion post.

this is the one i used now last.
http://steamcommunity.com/sharedfiles/filedetails/?id=150101501

im thinking maybe ditch everything but beasties and electro towers. the beasties in the narrow corridors to choke up the flow and then let the towers do their magic.
anyway Suggestions?

[Kappaccino]

Notice the two small areas just below the middle entrance? My strategy is I lay as many traps as I can around/in the left small area and defend the right small area on my own.

I've done this successfully on 2 of my heroic playthroughs though there are some leaks at the third wave but only enough to fill up a portion of the siege progress meter.

[Happy]

thats actually a darne good idea.