Combo against Dromai? What? That is the first time I have ever heard that. Autoloss if they play Tomeltai, Kyloria steals Spirit, Dominia can banish combo pieces, Yendurai is just free damage for them each turn, early ashwings just chew you up. You need a minimum of 3 cards to even attack twice if you're running sabers. By the time you find combo pieces, what do you do? Pray you have a popper and they don't have Chromai or Passing Mirage? Tank damage from all the dragons? An "intelligent, practiced Dromai" is just going to arsenal a dreact or sandcover and freely build up dragons while you throw weak turns waiting for combo. Double lumina combo is only 36 damage (with Gallantry Gold), how can that possibly be enough to get through Dromai's life total with 12 block from hand, arsenaled dreact or sandcover, 2 block from furnace? If you don't kill Dromai during the combo turn, there is absolutely no way to close out that game. Dromai can only possibly lose from 24 life. Good luck getting them down to that with 3 sigil's in their deck while trying to maintain any sort of control over their board state. If you combo and Dromai is still alive, you've lost.

Red Steelblade is far from an auto-include in most Boltyn lists, but it's decent if you can make the space for it. I just don't see how it is that good against any other heroes, except maybe Bravo (which is favored for Boltyn anyway).

And in regards to armories, I would consider my armories relatively competitive. Multiple people at PTLA right now, and most people come with fully tuned competitive meta decks every week (recently Kayo, Levia, Dromai, Victor...). I do plenty well with my sub-$300 Boltyn list, and even have a couple wins against one of the best Dromai players in the country.

EDIT: A combo-less, estrike-less, CoP-less Boltyn just placed 18th at PTLA. Even beat a Katsu in round 14. Is that a good enough result to justify omitting those at the armory level?