Snapfire

Secure ranged creep last hits with Scatterblast and damage the opponents at the same time.

Look for opportunities to cookie yourself in, or an ally or creep to stun opponents and apply follow-up damage.

Communicate with your allies whenever you are going to use Firesnap Cookie.

Pick up a point in Lil' Shredder if you are dealing with hit count spells like Tombstone, The Swarm and such.

When in trouble, use Firesnap Cookie to jump into a treeline or over a cliff.

It is very important that you land the first Mortimer Kiss to slow the opponents so it is easier to land follow-up ones.

When there is not much happening, push out the sidelines with Scatterblast and Firesnap Cookie.

Pick up Aghanims Shard around the 15 minute mark to provide a layer of burst to Firesnap Cookie.

Use Lil Shredder to quickly hit enemy wards twice to deward them.

Avoid staying too close to Snapfire on the lane as her main harassing spell is Scatterblast which does 50% more damage if you are within 450 range

Firesnap Cookie stun can be dodged if you run quickly towards the hero or creep that cookie was used on

Be careful with spells that have hit counter as they are countered by Snapfire's Lil' Shredder

To dodge Snapfire's Mortimer Kisses, make sharp turns and change direction

Snapfire's damage is primarily magical, getting magic resistance items or Black King Bar allows you to negate most of her impact in fights

Canceling Snapfire's ultimate can be a fight winning move. Try to position yourself such that you can get to her as quickly as possible. Getting gap closing items helps as well