This looks like a good amulet. Can you explain how you crafted it?
Step 1: Get hunter and warlord amu bases, one of them onyx base. Alt spam until you hit +1 int on hunter and +1 fire on warlord.
Steo 2: Use Harvest Annuls to remove all other influenced mods, then use awakaners orb. Woke orb will 100% hit the two +1 gem affixes and combine them.
Step 3: If you get Mana or rarity prefix from the Wokeorb, annul and if you fuck it up start again (chances of that happening are really damn low)
Step 4: Harvest Annul the last prefix and suffixes to get a raw +1/+1 base. If a non-removable suffix is on the item (rarity, mana on kill or mana regen) block prefix and scour.
Step 5: Harvestcraft cold and lightning mods for coldres/lightningres and bench-craft fireres to block all suffixes
Step 6: Spam Life-crafts until you hit T1 life. Its the only life-mod that can spawn since you blocked all suffixes by having 3 of them already.
Step 7: Remove Fireres and one other resistance, bench-craft castspeed.
Step 8: Augment and then remove/add caster crafts until you hit fire DoT. The hunter DoT mods are the only ones you can hit with a caster slam due to having crafted cast-speed and 3 prefixes. If you remove castspeed instead of a DoT multi one, just recraft it on the bench. (not even sure if the bench-block is necessary here)
Step 9: Once you hit triple prefix+dot multi, harvest annul the remaining res and remove bench-castspeed.
Step 10: Augment Chaos. Chaosres is the only available remaining mod. Remove/add until you hit T1.
Step 11: Add last bench-craft. Alternatively you can aim for Firedamage suffix by using harvest fire augments. If you hit fire-res instead, just turn fire res into cold/lightning res with harvest, target-annul that one, and try again.