Planeswalkers can protect themselves in several ways: by removing opposing creatures, by generating creature tokens that can serve as blockers, or by having a high starting loyalty that will allow them to survive an attack
Like cards with monarch, the quicker it's put online the better, and these multiplayer-focused mechanics tend to overperform in 1v1 scenarios
If something becomes a copy of the token, the copy also isn't legendary
Teferi, Temporal Pilgrims second ability is a token generator
The two most valuable cards from the set are blue instant Intuition, a surefire way to search your deck for a specific card, assuming you have multiples, and Earthcraft, a built-in combo maker with any number of other spells
The book side is sometimes relevant, especially when converting to your janky infinite mana and storm wins via Hullbreaker Horror and Jadzi, Oracle of Arcaivos, but in my experience, youre more interested in bouncing the book back to your hand than actually using it