Thanks for all your help, it's very much appreciated.
Just for the record my idea is to combine a symphonic orchestra with 6 percussion parts.
The parts being: 1)Timpani, 2)Glockenspiel and Chimes, 3)Xylophone and Marimba, 4)Tuned Cowbells and Tuned Gongs, 5)Cymbals, Snare, Bass Drum 6)Temple Blocks.