[2.5] Assassin VSpark Budget Gear

https://www.pathofexile.com/passive-skill-tree/AAAABAYAAEV8l5f79bQ45RmMNlRHidOmvnBSnsRd8g5IKwrjhBGWES8DHg3RG8gHHn_GH0FjQ8_dlS6io5Mn8Yrw1cHzD8S-iu-IbAiP-klRlSA7fKEvytP5N9vn7Bjr9S0fuMq0DNfPtMUsv8MJHU9Ms-q6RnFJscLsFde5kzW5rrNFftAfIG4NfDQKgwkFtSpbhq7yHRFQpytBlg5c7-tQMFfJN2axkBqNgl5WY20ZBULQ9Wr6KPospi2oWyZS7NlbLJyCx5DWvoB_-xslEFgdvkuudhEzh-kCA-4=
I recommend picking up Alchemist last, unless you have decent flasks or you prefer Quicksilver instead of a movement skill.

VSpark - Spell Echo - Faster Proj - Pierce - Inc. Crit Strikes (6L is whatever, get Crit dmg/Empower or sth which boosts dps)

Whirling Blades - Faster Attacks - Fortify

Herald of Ice - Discipline

Spark - Spell Echo - Pierce - Faster Proj

and if you want get a CWDT setup, not needed tho

Weapon: Spellcrit (get atleast 80%)/Spelldmg/Attack speed(its just a bonus to go faster, not needed)
Ring: Valyrium

Fill the rest with random gear, get some ES and resists

For Flasks you basically only need a quicksilver, you don't really need a Diamond Flask, since you will be at 90%+ crit anyway, but it doesnt hurt. Can also get Onslaught Flask for faster whirling blades. Make sure you have anti bleed on one of the flasks tho. 40% Damage flask is also not bad.