If you put an Equipment with job select onto the battlefield with Gilgamesh's ability, the job select ability and the reflexive triggered ability will both trigger, and you'll choose the order in which those abilities go on the stack
Your flying creatures give you superiority in the air
Following this, well discuss the best MTG cards for strictly applying Poison Counters and dealing Infect damage
However, there are better cards like Arlinn, the Pack's Hope or Tovolar, Dire Overlord that offer more impactful abilities and synergies with day and night mechanics, making them more viable options for competitive play
Otherwise, you may need to complete your deck with cards you do have in your collection and simply finish crafting the deck as and when you can in Magic: The Gathering Arena
This means that Teferi generally gets more powerful at twice the normal speed of any other planeswalker, letting you take extra turns far more frequently than is generally considered polite