as you know you wont get "hopping" performance out of that chassis regardless of the system you run so coils are a waste of money, as is a 3 pump system.
run accumulators with a 2 pump sys at 24/36 volts. that will be reliable and will give all the performance your ride can handle without busting.
or go air.......... either way is fine, depemnds on what you want from the car.
loads of MB folks on hereso expect lots of replies.