This is a build I like to play ash with, it is a lot of fun and breaks up the standard ADC build. Although it has most of the standard items i found that the addition of the statikk shiv adds a new element to how you deal damage.

The item sequence can be changed if you find you are having a hard time. if you are dying a lot then get the GA and bloodthirster before the shiv this will allow you to have more sustain and a bit of life steal but you miss out on the passive of the shiv

you should always max volley first as this is your main damage ability. i like to max hawkshot second because of the passive gold but if enemies are running away with low health then you could max frost shot second and as always max crystal arrow whenever possible