I've working on the best route to take on the Cloud Light level for maximum points and I feel this is it below. It'll take you down the routes which will either have loads of tiny enemies for quick kills or normal sized but strong, so you can keep that multiplier up and get the bonus more as they take more hits.
Also make sure you have the necessary perks. I'll work on the Dark version soon.
Start > Left > Left > Right > Right > Right > Right > Centre
Here's what you'll encounter and what else you can do;
Start: 3 Gold Flowers
Left: Fences, 2 Gold Flowers, Chest, 2x Tiny Balverines Waves and Barrels
Left: 2x Hollow Hobbes Waves, Barrels and Chest
Right: 2x Hobbes Waves, Presents and Chest
Right: Chest, 2x Tiny Guardians Waves and Barrels
Right: Gold Flower., Chest, 2x Tiny Mechs Waves, 1x Mech Wave, 1x Large Mech Wave and Crates
Right: 1x Guardians Wave, Vases Chest and Gold Flower
Centre: Gold Flower, Infinite Chests and Final Fight.