For Whip, Ecstasy with 0 bind is bugged/has an oversight where level 10 and beyond will match 1 bind dmg or do higher. It ends up being one of the strongest single target physical attacks.
Sword Hunter will want to utilize Bait stuff and Drain Bite without ailment.
I would recommed whip hunter.
Re: grimoire, don’t worry too much about it. Charge grimoire is useful for using Boost or coordinating with the likes of Wolf Pack (7 king grimoire; turn dmg boost). Wrath’s Migh can stack. Whip Mastery also (but not sword mastery).
"The Story will become Legend...." - From Riviera: The Promised Land