EDH/Commander Ertha Jo, Frontier Mentor Deck Tech Card by Card 

I've been playing Ertha Jo since she came out, and i find the deck to be a blast. Some standout recommendations of cards that i think you missed: Jeska, Thrice Reborn: activate and copy the 0 ability to have any creature do 9x damage. Auriok Bladewarden: double all your pumps. Really funny with multiple via Jaxis. RMS Titanic: turn any pump into treasures. Bloodshot Trainee: single mercenary pump 2x with Ertha down, hit two creatures for 4 every turn. Swell of Courage: make a creature REALLY BIG Smothering Tithe: this deck can field a lot of draw (especially for a boros deck!) but lots of it also gives your opponents draw (humble defector, loran, yes man, teyo). Smothering tithe is extra good in the deck, just beyond being an excellent card by itself.

will Delney tripple the activated abilities since ertha's ability is a triggered ability

Love the video, but I would like to point out a mistake: Ertha Jo only copies if it targets a player or creature, so Cathar Commando and other effects that you target only an enchantment or artifact do not get copied unless you target a dual-type creature.

I want to build this for pauper so bad but I’m not sure how I’ll win lol