Goblins & Gnomes can go LOS on many spots in RBG or regular BG without using any toys.
By this way you can win WSG & TP easily after you have gained the lead.
TP Alliance
TP Middle (you can go deeper in the hole)
WSG Alliance
WSG Horde
im not 100% sure does this happen on other races also but atleast tiny races fits better.
Only way you can take damage is from autoattacks and another goblin/gnome who can fit in the same spot.