To begin with let us all take a quick refresher on the four types of wilderness that are currently available for us to use to our benefit. Below you will find them starting with their lowest form and building up by name to their max level.

TYPES + LEVELS:
1. TREE: Bush(lvl 1-4) < Woods(lvl 5-8} < Forest(lvl 9-10)
2. MOUNTAIN: Hill(lvl 1-4) < Mountain(lvl 5-8} < Plateau(lvl 9-10)
3. SAND: Sands(lvl 1-4) < Desert(lvl 5-8} < Cliff(lvl 9-10)
4. WATER: River(lvl 1-4) < Stream(lvl 5-8} < Lake(lvl 9-10)

LIKELY LOOTS BY LEVEL:
These are the loots that the server displays are "likely" from the wildernesses. They are cross terrain and are the same no matter the type of wilderness it is:

Likely Loot by lvl:
1- -
2- Dye
3- Spices
4- Wine
5-Wool
6- Silk
7- Furs
8- Incense
9- Ivory
10- Diamond

POSSIBLE DROP CHART WITH FREQUENCY IN PERCENT:

Click here for full image

AMOUNT TO MARAUD (BASED ON NO TECH UPGRADES):
Below is a list by level and the projected minimal amount of troops you will need to maraud successfully and most efficiently with.

Level 1- 100-150 troops
Level 2- 200-300 troops
Level 3- 400-750 troops
Level 4- 700-1500 troops
Level 5- 2000-5000 troops
Level 6- 10k-35k troops
Level 7- 50k-100k troops
Level 8- 150k-250k troops
Level 9- 500k-750k troops
Level 10- 900k + troops
...