Place the cursor in the message body field in a new message in Mail.app using GUI-scripting?

I am drowning a bit here…

I just want a robust way to place the cursor in message body of a forwarded message in Mail.app. Can I achieve that using GUI-scripting (rather than sending tab keyboard events)? I executed this script:

tell application "System Events"
	tell process "Mail"
		activate
		delay 1
		get UI elements of UI element 1 of scroll area 1 of group 1 of group 1 of window 1
	end tell
end tell

(I had a forwarded message open when I executed this)

and got dozens upon dozens elements in return. Which one is right? How do I place the cursor there (so I can paste from the clipboard, which seems to be the only sensible way to insert text into a mail message).