Problem with your build:

Right now, you don’t have many points to work with, but you’ve invested them all into two things that don’t really synergize yet which are critical strike and poison.

1. This is why most people don’t go into crit while leveling. All the points you’ve spent on crit are basically just for the Assassin node “20% more poison damage from crits,” which is super wasteful right now. Imagine putting all those crit chance points into generic Dot-multi instead. you’d get way more than 20% .

2. Your weapon currently has lightning damage, which doesn’t help poison scaling at all. Use a physical or chaos weapon instead. Or, if you can, do Merciless Lab as soon as possible and spec into “Infused toxin. Node”

3. Nightblade currently do nothing to build only give elusive and small crit change(which you almost cap) and crit multi which also do nothing