Ovika triggers off anything noncreature, and a huge number of the tokens wincons in that deck are already enchantments, like Impact Tremors, Goblin Bombardment, City on Fire, Purphoros, God of the Forge, Sorcerer Class, Shared Animosity, Shark Typhoon, Sunbird's Invocation, Fiery Inscription, Mana Echoes, Cavalcade of Calamity, plus a dozen more, so perhaps just lean in
The card portfolios seem more like a nice present for a kid, or a nice collectors item for someone who just wants to pick up a few cards
Cast it when opponents have loaded hands but limited mana, maximizing the cards drawn before upkeep payments become unsustainable
It unlocks many more decks for it
In order to really get it, you need to understand that your foes are going to each keep their most powerful creature
It quickly became evident that you can build Atraxa, Praetors Voice around any type of counter, including poison and planeswalker loyalty counters, making her one of the more powerful legendary creatures in the game