It's essential to have a good balance of both to ensure you have quick access to attackers early in the game and also the power to handle the late game
If you, as a Group Slug player, want to stay in the game as long as possible and do as much damage as you can, having ways to ward off attacks without having to try too hard is a good idea
In multiplayer games, the Rig becomes a politics-powered removal cannon
As of November 2020, PSA 10 graded cards can sell as high as $30k yes, you read that right, literally the value of a car
The mutate cost is high, but the payoff is more than worth it, especially since it's easy to obtain that much mana with traditional green ramp spells
Sure, you want everyone to have a good time, but only until you decide to end the game