Build help please

Currently playing a ci vaal smite trickster. I have no idea what I'm doing after making a hex blaster for sanctum, I wanted a map runner for gold. Dropped a HH sold it used the funds too fund the ci vaal smite trickster. I have no access too POB and I truly need someone too have a look and make sure I'm not shooting myself in the foot.
Sometimes on t16's I'll come across enemies and bosses that I just can't kill their health regen is too strong. Also I'll sometimes just blow up and I'm left wondering scratching my head. I am also unable too get a POB for my character,played since synthesis haven't figured out how too do it without a PC.
Thank you for reading my wall and I'll fully Appreciate any kind of help or even a roast if it helps my build in any way. Thank you for your time and help.
Character: Hexxxxy

You probably rerolled or so. If you are an attack based build and you struggle with lifeheal of rares or uniques, take the mark mastery "Marked enemies cannot regenerate life".