not really no its just more useful for succubus builds seawitch doesn't give you a whole lot over anything else for succubus
my main problem with sea witch was that when outnumbered, the gangbang killed me, that why i started playing abomination. But now, beeing able to make aoe damage (something that i just realise thanks to you :D xD), that wont be a problem, and seawitch gives you a nive bonus to your thoughness so you can do even more damage