Honestly the order I stated is key.
The mp62 is already near the outside of its performance envolope as well. Putting more hot air around in the intercooler is not going to yield much at all if anything.
ECU
Chargecooler
Then go nuts 
You can see my progress on a non chargecooled car ( admittedly no IC either ) from here: Exige S2 with added supercharger - #15 by andybond