I'd power both Machamps to level 30. Buddy one or use rare candies. I'd leave this Eggy, Seed Bomb isnt so bad and you have three high level grass attackers (Eggy, Venusaur and Victreebel).
Edit: if Machops are common in your area, power only the 82.2% to level 30 and wait for a better ivs Champ from raid or evolution.