Since Esper Sentinel has a base power of 1 and the current power is 3, Sovereign Okinec Ahau attacks and places two +1/+1 counters on Esper Sentinel
PSA 10s are investment-grade and command massive premiums buy these if you want the absolute best or are investing for appreciation
Puresteel Paladin does almost the same thing as Sram, Senior Edificer in terms of drawing cards, but it looks for Equipment coming into play, not being cast
There is also less room in construction for things that cost six regardless of any mana returns they might offer
Swooping Pteranodon Swooping Pteranodon is kind of a chore to read, with it calling out flying Dinosaurs and making lands damage creatures, but its easy enough to understand once youve done your homework
There is no wrong answer, but there are very different approaches