Need help with the first boss

[unmerged(277032)]

I can't fucking beat him. He binds me and instakills me. It's easy enough to escape, but usually, I'm busy fighting off the spiders he summons. And even if I escape the snare while the spiders are on the field, I am poisoned and need to take a second to heal, which gives the boss more time to snare me again and oh my god WHAT DO I DO

Help, please?

EDIT: First boss in The Stars are Left, I mean

 

[Marnit]

I was a beta tester, never figured him out, and have not been able to get any further.
I did raise the problem, but nothing has changed as far as i know...
What i did manage to figure out was that you should attack him in the legs, and spam shields to stay save, and then AOE the minions
But i could not find a spell that would hit him enough

 

[Oneyr]

Here is the strategy I used to kill the big spider :
- Use a fire beam on her head when you have a moment (rarely) ; it will burn and deal damage on time.
- Always focus the medium spiders ; use a steam-electric beam to destroy them quickly.
- The life staff will allow you to be instantly healed when poisoned. Very useful in this fight.
- Use earth-fire projectiles and fire aoes on the little spiders to kill them when there isn't any medium-sized spider. This aoes will often hit the boss itself too, so it will be your primary source of damage on him.
- Use the Sprint Magick as often as possible. It will help you a lot avoiding the nets and the poison projectiles. Also useful to make a distance between the little spiders and you.
- When a net traps you, use fire on yourself. That will damage you, but free you. If you don't avoid the big spider's bite, you will die instantly, even with an earth armor.
- It's a very long fight, be patient.