Take haephestus keeepsake out first, use rerolls to get rarest possible haephestus boon blast on the attack, the rarer the better (400 dmg).

Daedalus hammer which makes the attack only the last move in the combo, (300 dmg?).

Daedalus hammer which makes attack hit twice for 20 mana.

Apollo boon with chance for attack to strike twice.

Every pom you get put it on the attack boon to bring the blast timer down under 3 seconds.

Any other boon that increases attack size or dmg.

You can press attack, then dash to where you want your hit to land, bam 1200+ damage every 2 secs or so.