Send one good pushing/farming (Heimer, Maokai, singed) champion to the bot point to capture and keep it. Of the other four, one will have to stop by mid to capture it and then head towards top, the other three (preferably three strong level 4 fighters) should head directly to the top turret to contest it.
After this opening, the plan is simple. Hold bot. Hold mid. Hold top. Wandering around the map looking for enemies is something that maybe one strong 1v1 (Jax, Akali, etc) should do, but the rest need to be on the defense.