I ran into many of the same "problems" you have when I was making my team(s). I think the best way to remedy Torterra, Swellow, and Moltres would be to carry a Special Scarf Saur over your physical one. Use Leaf Storm / Sludge Bomb / Sleep Powder / HP Rock or something, and you'll find that "when all else fails, you have Venusaur to revenge kill".
Obviously you lose a bit of pressure against bulky waters, but it's just a suggestion ^_^.
f u, v