From: foolm0ron | #328
I tried Force Staff once but I couldn't get the hang of using it well. I imagine you can save yourself or even pull an enemy hero away from his team if you know how to use it. If I'm going the support route then I love getting the Urn of Shadows as well for healz.
I'd suggest turning on the "self-cast on double-click" feature. Then you can just tap the button for Force Staff twice and you'll go sliding in whatever direction you're facing. Great for both chasing and fleeing. You can also save an ally who's being chased. Very versatile item, though it can also really screw things up if someone turns the wrong way right as you're casting it.
Diffusal Blade looks really good and if I ever play against that Sorcerer or Summoner or whatever I'll go for that, because I hate his demon golem thing. Too much agility though.
You're thinking of Warlock, fyi. Purge is great for slowing any hero, and it can also remove a lot of buffs so it's a great extra disable as well as giving you extra damage.
I guess Phase Boots are a nice option, too. I usually go for the Strength Treads on all characters just because it lets me live that much longer, but I should try switching it up.
You do have to pay attention to the active which might be annoying. It gives more damage than Treads and helps you chase/flee, but you're also getting worse attack speed/HP. Phase also prevents you from being blocked by units, so you can use it to counter Shadow Shaman's Wards and other similar things. Both are good boots. I like Phase on WR just since her two main abilities really rely on positioning so she appreciates the extra mobility.
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No amount of planning will ever replace dumb luck.