Stan Ascher

The conditional rules module - https://drupal.org/project/rules_conditional

Instead of having several Rules fire on one trigger, why not have 1 Rule pick from several components and save your system a performance hit. This will make your Drupal site run faster and make your rules much easier to read for the next developer coming in from behind, and believe me, that will make you some friends.

Lets look at recent situation where we had to consolidate several rules generating message entities

On the trigger of comment is saved