Value of my Dread Bite Suwayyah?

THIS seems like quite a doozy, so here we go.

For char lvl 84:

2 all assassin skills
136ed
4min dmg
42 max dmg/char level
1386 ar/char level
6ML
4LL
1

Blades of Ice
1

Wake of Inferno
3

Lightning Sentry

How we looking? 'Cause this thing seems MONSTROUS.

While it looks good at first glance it imho has no or only low value. Mosaic sin uses Mosaic. For a bladesin ed is too low and it's not ethereal. IMHO

Fleshripper or Death are better options. For a trapsin it has +5

Lightning Sentry but no ias and only

Suwayyah base so slow attack speed. Some

Runic Talons or

Greater Talons with +3

Lightning Sentry and Plague are a better +5 option. But afaik a simple

Crescent Moon is even better in regards of dmg for a trapsin.
Maybe I'm missing something as I'm no assassin expert so better wait for a second advice.