when pub scrubs start whining when they see you pick mid dazzle, silence them with this build B)
PS : i am a 1* crusader, don't know yet wether this build works in higher MMR or not

Harass midlane like there is no tomorrow.
watch out for ganks cause early game dazzle sucks at escaping.
when lane is easy, farm fast until you get boots of speed and aghanim then start to snowball with team
when lane is hard, start ganking on other lane. preferably enemy's carry.

Best matchup so far is against hero that can't dispel like sniper, TA, morphling
fighting versus jugger, slark, tide or LC will be hard and solo killing them is nigh impossible.
know when to overextend for a kill (i.e. knowing enemy can't backup your target) and know when to play safe at the back and keeping team alive (i.e. knowing bounty hunter or clinkz around waiting to ambush)
Nothl projection enables you to go beyond enemy tower and tree pathing makes it easy to find enemy when they juke