Treads or Arcane Boots
I'd say this is core to me. Then it depends on the enemys..
Necro3 if there's any1 Invis or vs some hero like leoric who gets picked much more often now ( Did a 27/6/11 game with him yesterday still i lost ^^ )
Hex but considering you can pull back the enemy from 1800 yrd its a little too heavy, still you always can make use of it
Linkens can be pretty nice considering your enemys got stunners..
Dagon? A no way item - So you take this 400 dmg and then? Manareg and stat gain are worst for a 3000g item...