no shield? no blood? dark pact is useless since u dont have anything that uses blood
poisoned blood adds 21% crit to dots its a must have
this build would be somehow viable in astral, still no shields will make u die in an instant if something touches you
I would take summoning mastery because spider has a habit of dieing alot. Tho acid is bad atm, lurker builds gives way more damage, next patch they said they're improving acid.
Just try the build, see if it fits your needs, btw u can get a free respec from robot in bank at 60, and u'll get one as 6.0 comes too, so try

.