depends alot on other team... if they are good they just gang you all the game... and if u are n00b yourself u got no mapcontrol so u will die alot and suck if the others are bad and just farm their lanes its pretty easy

Pudge
That hook spell is very easy

any invs hero is easy as its hard to die in public nobody buys dust/gem/wards
clinkz gondar riki weaver etc

Ursa with edge owns everything. trust me.
This is how it goes: Start with 2x slippers of agility
Buy ring of reg in sideshop as soon as possible (needed for newbies)
stout shield in side shop.
boots (not threads)
Vladimirs offering
Lothars edge
finis phase boots
vanguards
heart of tarrasque

This is how you do:
Farm at your lane untill you got vladimirs offering (about lvl 8)
Then go kill roshan. (cast overpower, when 3 secs cd left on it go and pop ulti after first hit - free kill)
How to get free kills:
Spot a hero at a random lane, pop overpower, use edge, go next to him, use stomp, ulti. if needed refresh overpower, but he'll most likely die in just 1.
Seriously you cannot fail, and if you do just farm anci creeps and you'll rape.
If you fail this donate ur cdkey

Yes they do.
go for some uber agi hero instead. eg ursa, tw, ap

go cm and give your team aura at least

i play ursa or leoric.
they both are great.
i like ursa moar

i love leoric the items i found the best with him are:
treads
soul ring (simply amazing)
mom
basher
rapier (so ez to get with him)

you can farm these items very quick and no1 can fuck up ur ulti or out run u.

invoker is easiest imo, try him out