Ablative DR and Recovery? Help

[satanicway]

I need help modeling this power:

I want an Ablative DR with force field, affect others and area effect, that costs fatigue, huge amounts of fatigue, like 10 points. It must have reflexive, and i need it to consume all your actions on the turn to maintain the barrier. (probably All-Out)

The problem. I want that every time the character expands the 10 pts of fatigue, to activate a new shield, it comes full.
The idea is that he uses his energy to create a shield. If the shield is over, and he still have some energy, he can make another of same force. But he cant do one barrier of more them 100 Ablative DR.
I need to do this all, without it becoming overpriced.