How many damages, yugioh experts?

1. Special Summon Dark Armed Dragon

2. Remove from play Mystic Tomato+ Necro Gardna to Destroy Giant Germ+ Marshmallon

3. Special Summon Exodus by returning PlagueSpreader to my deck

4. Play Advanced Ritual Art, sent 3 Skull Servant, and 5 normal monsters (lv 1) to grave

5. Remove from play a Dark Normal monster (not Skull Servant) to destroy Spirit Reaper

6. Attack all (2800 + 3000 + 7000 + 2400 = 15200)

I do not like to gamble with Monster Gate, but I will tribute Demise and special summon Blue Eyes White Dragon (from deck), and if I do that ...

15200 + 600 = 15800

5 normal lv 1 monsters could be 3 copies of: ....Charcoal Inpachi + Thousand Eye Idol (not going to name all of it)

First, I would Special Summon DAD, remove Mystic Tomato from the grave to destroy Giant Germ, then remove Necro and Plague to destroy Marshmallon and Spirit Reaper. Then, I would play Advanced Ritual Art, sending some Normal Monsters from my deck to the grave to bring out Demise. Next, I would Normal Summon King of the Skull Servants, then play Monster Gate, tributing it, and bringing out hopefully a monster with 2800+ ATK (so then I can OTK later), let's say BEWD. Then, I would attack with BEWD, DAD, and Demise for 8200 LP.

@JC: Mist Wurm needs 2+ non-tuner monsters, you can't use DAD and Plague to bring him out, so that wouldn't work.