General DiscussionHow you build necro

Treads > mek > agha > blink or dagon > shiva > octarine core

Or u can go full heal necro with
Arc boots > urn > mek > agha

Farming necro
Phase > HoM > agha > dagon

I prefer smthng like
PT => blink => aghs => shivas => octarine => refresher

you don't need treads right away, actually every boot is good on necro, but I'd do brown boots, bassy, mek. Then get a point booster. Then decide if you want to finish aghs, if not you can go shivas.

Tranqs are good on necro cus they are cheapest, best move speed and have armor. Treads good cus of stats, phase good cus of movement, more harass dmg, travels good for pushing, even arcanes can be fine on a team that needs them and allows greaves later.

treads are good for early sustain if u r playing mid, also worth it thanks to switching treads spam

phase boots for laning, arcanes if you go supp
tranquils make very little sense cz u dont need regenration and u r not expected to take a lot of physical damage

you arent? I tank on necro all the time, run into the fray, spam Q.

just get blade mail, blink and aghs on this hero and you're fine

I personally like Arcanes because the GG boots are awesome later and the bigger mana pool is pretty useful early. After arcanes i usually get mek>blink>Ags>Shivas>Octarine>some other random late-game item.
Get GG boots whenever i start to run low on slots, usually after ags or shivas. I also occasionally get bottle if I'm mid, the regen is great before you max Sadist. Necro makes a good tank provided he get a kill early on into the fight. Once you build up those sadist stacks he can be almost unkillable.

Late game situational items include Refresher, Scythe of Vyse, Eblade (if you went for the dagon build), Radiance (if you really need more push), BKB and Lotus Orb
Don't get Heart. its poor value for money on Necrophos.

Aghs Refresher for the lulz

if i go necro in a dual offlane i go arcanes > mek > blink > greaves > aghs usually. depending on the game i may just go dagon. if im carrying/mid i like to go treads > dagon > blink > aghs usually. sometimes ill get aghs first but i prefer the mobility. later game get shivas/sheepstick/refresher