One for each God-Eternal, I suppose
With this knowledge it is best to play the Mana Leak earlier where possible and sensible
This list is designed to help you determine which of these removal effects to slot right into your limited deck and which ones to avoid like a Phyrexian Plaguelord
Gitrog is known for being a strong commander, and a lot of Gitrog decks contain a few combos
Farseek Incredible ramp Farseek reads: Search your library for a Plains, Island, Swamp, or Mountain card, put it onto the battlefield tapped, then shuffle. That means you can put one of your Shock lands - like those above - into play using this spell, which is amazing
Forsaken Monument is huge for colorless decks in general, offering you a +2/+2 buff, extra mana from colorless sources, and even lifegain on top