Enigma mostly jungles, that is true. It can also be used on lane, but it is kind of weak on it due to low health and short range, works decent on a triple lane or a push lane. Normal for jungle items is chicken (later upgraded to flying, so you can get items there). A bunch of clarities and whatever else you want at the start (maybe a sobi mask for regen). If they havn't warded the jungle to stop farming you should rush dagger. If they have warded the jungle you should get boots first.
Since you jungle you should gank, same as all junglers. Depending on what you have on the lane nearest you you can start ganking at level 2. If you have a bad lane you might need to wait until level 6 in order to gank. If you do gank, know that it will burn all your mana, so you either have to wait for clarities to give it back and then jungle more or pull creeps to the lane. Pulling before a gank is pretty decent since you get more creeps after the jungle ones are dead and force the lane in a certain direction.
After the lane phase when you have dagger you are a ganker and initiator. Your job is to kill opponent heroes and get your ulti in. If you have no hero in your team that can gank, just keep warding and protecting your carries. The farm you get should go to either meka, necomomicon or guinsoo depending on match-up (on some occasions the cheap eul is better than guinsoo), might need faster stat raisers such as bracers if you get crap for farm.
Side note, Enigma, Lich lane is funny (not played any more though). Both destroy own creeps, meaning the tower gets pushed quickly. Nice if you want your safe lane to be long quickly, that way you can usually get better farm on the carry hero. Downside is that the ones that were at that lane for the opponent start ganking and that they got free money, your jungle is suddenly much more risky as well.
Void, get treads, basic stat boosters like bracer/wraith, then mom (unless you get GREAT farm). Once you have mom you can kill many of the heroes in the game. Afterwards get whatever that suits an agi carry. Things like MKB/butterfly/battlefury/ghostscepter/S&Y/manta... Might be a good idea on some occasions to start out with a stout shield, on other occasions it might be better to start out with Quelling blade, it all depends on what type of lane you get. Will you get harassed to death or can you farm?
Morphling, treads, basic stat boosters -> manta style. Often a good idea to get magic wand on morph since he uses a lot of mana.
