I think I would cut the third copy of
Arvad the Cursed. I know you have sac outlets so extra legends aren't
dead cards, but a 3/3 for 5 isn't a great deal even with deathtouch and
lifelink. Would you really be happy sacrificing an Arvad to
Vicious Offering (a 1-for-2) or Yahenni (a 1-for-1) to enable you to cast the drawn copy? I know I wouldn't. The +2/+2 to legends is narrower than I'd want so I'd probably replace it with a third copy of
Legion Lieutenant or a second copy of
Call to the Feast. Given the two copies of
Anointed Procession, I guess
Call to the Feast is probably the right choice.
Baird in the sideboard will be hard to cast on time with 14 white sources. You'd ideally have 18 for a 2WW to be ready on turn 4 on the play and getting him to come down early would be super important since he's pretty clearly there to stall out aggro. There are better options for anti-aggro in your colors. I understand not wanting to play
Settle the Wreckage but it works. Otherwise
Radiant Destiny could be your ticket here. Your tokens theme means you'll hit Ascend very easily and one of the best ways to beat aggro is to outclass them with better creatures. That's why midrange is aggro's natural enemy - weenies lose to bigger creatures.
While on the topic of Ascend
Vona's Hunger also has good potential for answering enemy armies, if less targeted.
Queen's Commission is probably better than
Squire's Devotion. It can't be blown out by spot removal the same way and it will boost your creature total better thereby increasing the bonuses from
Legion Lieutenant,
Anointed Procession, and
Sanctum Seeker while providing more sacrifices when you want them.
To summarize and finalize my suggestions:
Maindeck:
-1
Arvad the Cursed+1
Call to the Feast-1
Vicious Offering+1
Vona's HungerSideboard:
-3
Baird, Steward of Argive-3
Squire's Devotion+2
Radiant Destiny+2
Queen's Commission+2
Legion LieutenantI could work on it more, but I'm afraid I'd drift too far from the original deck and be building a different deck. The legends theme doesn't quite seem to pay off enough and I'd make different choices due to a different playstyle.