So a composite bow with something like:
Slayer
SSI
DI? Can I use a whet stone on bows?
ML
SL
Does that look about right?
You can whetstone it. You love can use non -exceptional ones.
Don't try to pack all on one weapon. DI better be on suit. SSI too. This makes room for velocity or hit spell.
Hythoth rooms are small, think about crossbow.
If you will have cold weapon no need for a bow to be composit with AI. Use Yumi, shoot fast, put hit area instead of Mana leech.
If you can maintain Consecrate (I cannot) don't need cold too.
So my advice : if you are still wondering what to use, imbue LOTS of weapon not to full intensity (no essences or void orbs, no POF ) . Try them first several days. Dump useless , copy good ones on exceptional +whetstone +POF and imbue to max.