Omen of the forge is nice if I am in red but
Oath of Kaya or
Life of Tostiro Umezawa do similar things without requiring a splash.
You didn’t find that seas was too awkward vs daze? Did your estrids copying it ever die to wasteland? I could consider it replacing strix, but strix seems so much better vs delver and jeskai.
Tribute seemed quite strong, but the non-bo with trial seemed too strong to include. I thought the estrids plus trial interaction was the reason to play the deck. Also I was worried that it made the deck too weak to prismatic ending which otherwise the deck handles always at card advantage.
Out of Time is a boardwipe that gets better with our own tokens and has a very high synergy with aminatou. It seems like a good option to avoid splashing for hitsegu; Have you tried it?