Sure, if you have any.
Can't ever guarantee they're good, but I always have suggestions.
(As I said before, if it involves "Hang on for dear life", you can ignore it.)
Shuak, currently, is just a basic monster with a metric crapton health. He isn't really all that special, he has a tongue attack and a tentacle attack, but both are fairly minor. The players, on the other hand, are all badasses. The weakest of us has three class evos and ten skills going for us.
The combat system isn't broken, (at least, not that I can see) you just have to remember that this badass destroyed the world. His equivalent should be someone with five class evos and and 15 skills, at the least. The Malakai boss had 9 (I think) attacks per turn and summoning abilities, and he STILL went down without even killing anyone. Wolf has an ability that allows her four attacks per turn, and nearly everyone else can attack twice per turn. Shuak should be able to match the best of us, in any field.
In short, build him like a player. It's why I made villains in D22 after Hake went down without even knocking one of you unconscious. Players, or things that are built like players, will always have the most power in a game,
because games are built to let the players win in the end.
He should have evos that let him spit acidic bile, tongue attacks that automatically trigger a series of bite and chew attacks, health drain abilities, nifty little things that let him spawn out minature beasts of his own flesh that are basically toothy maws with tentacles attached. You know, beastly attacks that are sure to kill us in a couple minutes.