Okay thanks for the suggestions:
https://www.grimtools.com/calc/Q2zOr9vV
Is this closer to what you had in mind?
I think I’ve made all the suggested changes - dropped belgothian completely to invest in Execution and cap pierce res.
Not sure why I didn’t have widow, think I was prioritising ADCtH from Toad which was probably unnecessary.
Will see how only 1 Seal of Blades goes - changed to Seal of Skies for additional Lightning and physical conversion.
Edit: Although Belgothian does give stun and does decent weapon damage, so maybe it’s worth having for the 20% WPS to do a bigger chunk of damage?