Oh god another white deck... I'm just thinking of even more exiling shenanigans now...

For your Maybeboard you don't need Birds of Paradise. You don't have that many colors and while Harabaz Druid is slower, it's pretty much the only mana ramper you need. I would add Kabira Evangel. Being able to protect your creatures from a color whenever an ally comes into play is nice to have.

Another card to consider is Mimic Vat. Phyrexian Metamorph is also good. It can either give you another ally to work with or you can match the opponent's threat by copying it. Might be better sideboarding it though to use more on opponents with bigger threats.

White is a must with Allies. It is debatable to splash red instead of blue. Red gives you the big artifact hater in Tuktuk Scrapper and Akoum Battlesinger is a great aggro card.

The Maybeboard was just to list the allys I can potentially get depending on which color I run.

R/U/B all have a few good cards.Sea Gate Loremaster's draw card effect is nice( maybe it's just me ), and Seascape Aerialist's flying effect will help, even if it is 5 mana. Along with Phyrexian Metamorph, there's Jwari Shapeshifter, even if it's limited to only allies. There's a "+1/1 counter when ally comes in" creature for each color, they'll all have that at least.

I was considering utilizing Bala Ged Thief + Halimar Excavator + Agadeem Occultist. Does the Occultist remove the card from their graveyard? I can see that messing up Eric, even though Halimar Excavator will probably help him more ( or mill him to death ).