I am really steering more and more clear of ways to draw cards that are highly board state dependent or even sniff of winmore. Teferi's Ageless Insight is a fine card, but if you've got varina on board and are doing your thing, you're already in a good state most of the time; percentage of the time I would rather see a good zombie than a draw doubler is pretty high.
So I am leaning hard toward Epiphany at the Drownyard and Fact or Fiction (or even Painful Truths) effects that are always good regardless of our board state. Kindred Discovery is the sole exception I have right now and my thinking on it is that it's basically decent if I have even 1 zombie in hand, since I can cantrip that zombie, then keep attacking with it to draw cards.
I think I would play Alhammarret's Archive before insight because the lifegain for racing is significant. But I don't intend to play either. Big, splashy, but extremely varina dependent to be good.
This is largely anecdotal but my experience with the draw doublers with Varina is that once one of those hits, people are a lot less likely to let you be once it drops. They immediately will try to kill either varina or the doubler, vs. letting you swing out when you're not drawing so many cards. The mind game there is that if you're getting your card advantage with Varina by discarding things that accumulate incremental value (Master of Death, Sevinne's Reclamation, Dread Return, lands with Crucible of Worlds) you get far less attention.
I'm still right on the fence about cutting Kindred Discovery since it's a huge splashy effect too that pulls a lot of aggro. But because it's strong even if something happens to Varina, I keep it for now
I think I add Fact or Fiction before adding any other draw effects, and honestly probably should play Fof before Epiphany at the Drownyard -- I just really enjoy the limitless ceiling on Epiphany and it also allowing me to draw my entire deck off of infinite mana, or most of it off of Altars.
TL:DR - Those games where you play varina and a draw doubler and go bananas are the type of thing to inspire bias in people; you win really triumphantly and it's memorable. But it's also by far the exception my experience.