Not Updated For Current Season
Each champ has skills and/or items to immobilize escaping enemies
I'd recommend laning Singed with Ryze and Twisted Fate with Malphite, if the opposing champs start building resistance have these pairs swap lanes pitting magic versus armor and attack versus magic resist keeping the advantage on your side
I figured it would make sense that all the melees have heal because they'll be taking the damage, and for those that think healing potions are better I disagree, heal heals for more, it's instant and your not wasting gold on potions.
In my experience the teams that were the best at ganks had two things in common; immobilizers and poorly balanced, there was always just one champ getting the kills and no defense to speak of so teammates might survive a solo fight at best. This team is more balance with two tanks, a mage, a ranged and melee dps.