Because of the layout, split cards are allowed to be a bit more varied in their effects, and it is not as crucial that the two cross over aesthetically
Knight of the White Orchid was the gold standard for white mana ramp for a long time, and it has only recently had challenges from cards like Loyal Warhound and Cartogropher's Hawk
The signature card for the deck, Zamriel, Seraph of Steel, gives all your equipped creatures indestructible, which might be a great place to start if you wanted to make an Equipment-based Commander deck
Alaundo the Seer Alaundo the Seer reminds me a lot of Jhoira of the Ghitu since you get to exile cards from the top of your library, and you can later cast them for free once their time counters are gone
Pre-sales of this card are in the $40 range, with large retailers charging even more