The usual magic rules apply here. Please don't post a solution that if a solution for more damage already exists. Please be explicit in mana usage in your solution. I've tried to ensure that there are no infinite loops available, but if I somehow missed one (that Kiki-Jiki's always causing trouble), please inform me and I'll remove the required components from the puzzle.
For this puzzle, assume that unless otherwise modified, the bottom of your library will always be 50 mountains, regardless of shuffling. Similarly, assume that beneath any cards deliberately placed on the top of your library, there will always be 50 mountains regardless of shuffling. Basically, you can't just activate Grenzo blindly and say that you hit whatever you want. Cards on the top or bottom cannot be assumed to exist there unless deliberately placed there in your solution.
Oh and for those wondering, no, the punny titles will not stop as long as I can help it.
It is your main phase 1. You have just had a Goblin Recruiter enter the battlefield (don't worry about how, it's magic) and are about to resolve its ability. Defeat your opponent this turn by doing as much damage as possible! The solution that gets the most damage through wins. I won't tell my current best record as I don't want to dissuade other answers that do less damage from getting posted initially, but suffice to say that it is in the triple digits.
Your board: (all untapped; recruiter has summoning sickness, the others do not)
Grenzo, Dungeon Warden with a +1/+1 counter, making it a 3/3
Coat of Arms
Door of Destinies
Empty the Warrens
Goblin War Marshal
Goblin War Strike
Hall of Triumph
Kiki-Jiki, Mirror Breaker
Krenko, Mob Boss
Zada, Hedron Grinder