Collect allows a mage to cause all the instances of a particular element within the area of the spell to begin moving together and combining. Collect Flora (wood) could be used to gather all of the incoming arrows into a large ball which can then be launched back at the enemy, or to Collect Time and make it so that all actions within the area of effect of the spell take place in a separate bubble of existence where time is stopped.
Disperse allows the mage to disperse the element upon which the spell is being cast. This can either cause an instance of the element to break apart, such as causing a campfire to disperse into a million little candlelights, or it can work on a molecular level, for instance, causing a rock to burst apart into thin air. The GM must remember the law of equivalent exchange and make sure the mage isn’t able to spend a few points in order to use “Disperse Fauna” to blow a dragon to bits.
This could work in many ways, but for the most part the energy point cost is going to be concerned mainly with area and duration. For every foot away from the mage the epicenter of the spell is to be, add one point to the cost. For every square foot around that epicenter, add one point to the cost. For every full round or minute the spell is to last, add one point to the cost.