For the intent and purpose of an Amp Dmg bot, is there really any difference between Siren and Succubi?
Sirens cast amplify damage, succubi don't. All the succubus class only cast defense curse and blood mana curses, and the blood star (physical) + kick attack (magic). The siren class cast amplify damage, weaken, defense curse AND blood mana, along with blood star + kick attack. So you can't get the physical immune hell temptresses since they don't cast amp, and when you do get sirens they can overwrite amp with their other 3 curses. But they seem heavily weighted towards casting amplify damage over the other curses. Its unclear what % each curse has, parameters aren't labeled in the txt files
But it is a bit annoying that even if you take a holy freeze + cursed siren, she can overwrite amp with a useless weaken curse mid combat and fail to proc amp again.
I personally switched back to lancer for TZ games. Holy freeze + cursed alone seems to proc amp reliably enough on elite packs and especially heralds with their massive clumped mobs, but the lancer deals way more DPS to immunes and even 1 point and no might/conc/fanat she's already at ~17k damage. Very helpful for taking out immune heralds, and bosses die instantly to tainted anyway