While this isn't an exact science (since expensive reprints will limit the price of new cards, which might be hurting the Bant deck a bit because it has the highest-value reprints), this system works pretty well in general
Dawnglade Regent Most permanents that give your team hexproof give it to other permanents or creatures, not itself, which makes Dawnglade Regent unique
Its prowl cost gives you an extra turn spell, and these three can all be brought to the top of your deck with Faerie Harbinger (as expensive as the Harbinger is)
Youll blink a target to protect it and immediately get a 1/1 shapeshifter token, which may act as a strong surprise blocker depending on how many typal bonuses you have
From that point on, they became enemies
Arena Tutor Have you used Draftsims Arena Tutor yet