She was the first HOTM I ever got and I have used her a lot although not as much recently.
She is a lot like SG’s golden boy gravemaker but overall does less DOT damage. Much like how the original gravemaker is getting a bit aged, so is Clarissa.
3 possible changes;
Add an additional effect to her attack, like targets hit cannot gain any buffs for 2 turns.
Or
Instead of normal poison damage, maybe a corrosive poison (at the same DOT damage) like dark lord or costume jabberwock would help give her versatility by adding a reduction in mana regeneration
Or
Conditional effects to her attack like last 2 turns longer and is undispellable to holy targets
I guess an easy change would be to just increase the damage to make her inline with gravemaker but I think the buff should help make her a bit different
A change to sorcerer class could be beneficial as it can help give her a bit of utility ( and we can use more decent sorcerers)
She’s Paladin class, so something that could make her tankier might work - houw about +46 Def to all, goes with her talent and the elemental link of ss Def this plus an extra turn of dot and I’d use her again