Its facing some stiff competition in the two mana removal space, especially with Get Lost and Bovine Intervention, both of which are more flexible, but Parting Gust makes up for it by exiling its target instead of destroying it
Most magic decks are highly focused one or at most two strategies for winning
While it is dependent on someone attacking with a bunch of creatures, its more flexible than it might seem at first
Lathiel, the Bounteous Dawn helps turn life into board strength, and Heliod, Sun-Crowned keeps that growth rolling
Its time to train yourself to look at nothing but the type line
Combine him with cards like Food Chain for infinite mana, enabling you to cast Prossh repeatedly and amass an army