PoE builds similar to [3.11] Spellslinger Volatile & Detonate Dead Build - Necromancer Witch - Harvest -Path of Exile 3.11

I've spent 45-50ex so far. With \~30ex budget i had roughly half the damage but same defences.

gems awakened cascade 20c awakened unbound 15c divergent inspiration 4.5ex x2 (dont really need divergent inspiration on desecrate) detonate dead 10c withering step 20c enhance 4ex x2 (save 4 ex if you use level 3 enhance on withering step but you lose 1 stack of wither) desecrate 1 ex herald of agony 15c 18ex 80c gear (including essences + eldritch currency to roll prefixes/implicits) 2x 6 link 5ex bow 5ex (crit essences until attack speed, wipe prefix, cannot roll attacks, beastslam/annul prefix) asenath with enchant 2ex body 3ex gloves 2 ex ashes with good rolls 1ex, 60c an

POB: These flasks is for mapping and for single target none of these really do much since I am indeed aliment capping on end game bosses like shaper and not aiming for ubers. Onslaught even kills my single target because it screws up the desecrate triggers. So I am wonder what do I even use for single target bosses. Since I am crit capping and have quick a lot of increase damage taken so even bottled faith is not that great either.

I got lucky and get 2 doctors from ritual and managed to upgrade my Bow and get corpse pact jewels and now I am free from skitterbot reservation. However I am not sure what I should be using now that I am here. I should be able to afford an reservation enchant but I do not really have sockets to spare anymore (or is the combustion setup even worth it?). Is Petrified Blood worth using in my case? I cant really make use of the low life spell damage nor do I think I really need the damage since I am not going for uber uber fights. But I am not sure what I should make use of the remaining reser