How to level a dwarf spoiler fast: where to go, which weapons to carry, when to take the classes and where the tasty spoil is.
What pushed me to write this was a comical situation I witnessed one evening sitting in my clan hall in Giran: a character with the word "spoil" in the nick shouted and swore for a long, long time that he could not buy a DC helmet, although spoiling the keys for it and crafting it would have been much quicker ). I do understand that everybody wants to dominate, but a spoiler will come in handy in any case, so no alternatives: create a little fatty and off you go.
Our first goal is to level quickly to about 60, so without lingering anywhere and having crumbled a few gremlins, at level 10 we run to Dwarven Village. To begin with you can spoil recipes for resources: true crafters who get these recipes themselves are not met often, so there is a chance to trade in them. You can also do the quests of the village if you play on a low-rate server.
Along the way, moving from location to location, we start actively offering ourselves as an academy member: you will certainly be picked up and given some money. I prefer to get hold of B duals at once; we look for B shots, a few white heal potions and, if there are any, mana potions (if not, it is not critical). A word of explanation, since I have been asked: why B duals at a low level? When I come to a new server I check right away what the penalty is for a weapon of the wrong grade, and if you can run with those B duals without being slowed, I run with them, since the damage is much higher, on newbie raid bosses too, and the frequent misses are still made up for by the bigger DPS. If the char with off-grade duals can barely move, then of course you have to look for a weapon of your own grade.
That is it: forget about other weapons until level 70 or so, no pikes, we leave the trains to the crafters. Our main task is spoil, and an unspoiled mob should disgust you ).
We buff ourselves and TP to Wasteland from Gludin Village, run to the sea and look for mobs of levels 19–22 and spoil them hard. Having levelled to 20–23 we get the first class (if the class is not sold on your server, we do the quest Path of the Scavenger and become a Scavenger). Right there on the coast we look for the level 21 RB, it always stands there (or TP to Forgotten Temple, there are about five RBs around it), and in 15 minutes we torment the RB to death; repeat as many times as needed. Then we register in the catacombs (the first registration is free) and do not show ourselves on the surface until level 40.
Then we take the second class, Bounty Hunter naturally; on the way, for finishing the academy, we are awarded a piece of iron for the head. If by this time you have traded up enough, buy the full plate set (if not, the composite armor) and C jewelry and run on levelling. There are many options here: if the registration in the catacombs is open, your way lies to Catacomb of the Branded, TP from Giran to Giran Harbor and on foot over the hill; if it is the week of victory, you can spoil somewhere else. I usually head for Pavel Ruins near Schuttgart: by the TP there are many golems, one of them a tasty one, with drop and spoil of 
Mithril Ore in large quantities plus C weapon enchant scrolls from the same mob, and inside the laboratory the golems are x3 and x4. By level 55–57 you will have a great deal of mithril ore and a certain number of scrolls; what to do with them you decide yourself. Put on the BW heavy set and B jewelry and get ready for the spoil proper: the keys for your first DC robe set for the mage main ).
More about the skill itself, the levels of mobs and what to spoil for: All about spoil in Lineage 2.