I've been toying around with this deck in Masters and I've been doing surprisingly good with it so far (~70% winrate).
The obvious outrage is hitting
Daring Pioneer and
Daraka, Queensguard with
Divining Rod, locking the opponent on board and in hand.
Daring Pioneer has been a big contributor to this deck's success (I might add the 4th).
Shepherd's Horn has been underperforming. I cut them down to 2 Maindeck and removed one from the market because I wanted another way to accelerate my threats into play and sometimes the lifegain is okay against aggro decks. Additionally, having too many "bad" topdecks in the late game (Power accelerants and Horn) can also be really punishing.
Trail Maker's Power fixing is actually really important, hitting TTTT and PPP in a 2 color deck is not always as easy as it sounds.
I started with multiple
Equivocate but I removed most of them in favor of
Unseal, which seems pretty good right now to counter decks that try to go over the top.
Sweet decklist, will try when I get home.
I think Trailmaker is necessary for Power fixing and in general the Power acceleration is really important because the deck runs so many expensive cards.
I don‘t think that Hailstorm is a big impactful card against this deck (e.g. Sandstorm turn 3 and basicslly every threat doesn’t die to Hailstorm).
In my opinion it is not really possible to change the deck too drastically because you need enough targets for Rod.