You need to choose a class at the start of Farglow, but that only determines your initial stat point distribution, your starting skills and your weapon. After that you can pick and choose whatever skills you wish, and distribute your stat points however you wish.Character Optimization
Are you in the summoning chamber or throne room?
Do you have any spare skill points you could use to play around with different strategies?Defeating Laiken(spoiler)
If you are not already playing on Easy, you could drop the difficulty temporarily.
Drinking a few temporary boost potions just before the fight could help get you started off a little better.
Try to find some cover, where you can pop out to attack, but hopefully get ranged attacks blocked. Your creature could help with this, or at least be a distraction.
What level are you? If you have a save before entering the summoning chamber you can always reload and level up some more (presumably you have already finished off all of Broken Valley and Sentinel Island, other than 1 quest in each that can not be done until later, but you can head to the fjords).