This is my own builds .. in case enemy has pudge then go for mid and pick after 3-4 mins buy observer wards and place in enemy area so that you can avoid his hooks

always pick haste and you can take 2x kills with haste

in case enemy has too many disablers like LION/ SHAMAN /LESHAR / SLAYER go for bkb

if enemy pick phantom lancer .. then go for battle fury and ( rediance instead of basher)

dont make shadow blade or anyother stupid items


****************************URSA 3RD SKILL UPDATED***************************
since ursa 3rd is not a uniquie attack modifier .

you have a lots of options .

like you can take roshan with just a mask . in lvl 4 or above at 7-8 min


*****************************ULTIMATE UPDATED**************************************
now its ultimate is like a buterfly with 80% miss chance.

use it carefully it will give u a complete blind for few sec and u can do anything with it .