Re: How to play Morphling?
Playing Morph is all about stacking your Agi as much as possible.
There are many choices for his tier 1 item, Linken, E.Blade, Manta etc... It's up to your playstyle, is it aggressive or defensive. If it's aggressive, having some time to farm and rush a E.Blade is a very good idea, it's just like a Spectre rushes her Radiance. Manta is good too but I don't usually pick it up unless I've already got the E.Blade. If you play defensively, Linken is a good choice for you. When you realize the mid game's pressure is too much for you, Linken is a good option, the mana regen will help you morph for a very long time, especially when you get ganked, the bonus stats are pretty decent. Sometimes, BKB is a very good option if you see there are too much burst damage and disables coming too you, especially hex, its long cast range will barely give you time to waveform away, so you'd better watch out if there is a Lion or Rhasta.
The next tier 2 and 3 or 4 are up to you, you can buy any items you want, Manta (if you haven't got it yet), Skadi, Butterfly etc...
After getting tier 1 item, your life is much better and easier. The fact is whether you play aggressively or defensively, you can still have some influence after you got some items, even just a perseverance or an ultimate orb. That's that power of Morphling, by stacking his agi, he hits really hard in early and mid game compared to many other carries, and Waveform is a very powerful nuke as well as good escape mechanism. I don't mention about Adaptive Strike in early and earl-mid game since not many people choose to skill it, most choose to max Waveform, take some stats and then max Morph. And another reason is it won't be so effective if you don't have too much agi. But if you got an early E.Blade, you can kill a target within 2 seconds, especially fragile heroes such as Rylai, Rhasta... Just get in, E.Blade, waveform and Adaptive Strike, that's a lot of burst damage coming out.