how to beat zeugl on hard mode.
so if u have raven armor then beating zeugl must be easy-mid difficulty and u probably wont need this guide, but if ur lazy like me to do side quests then read this.

1. before u enter sewers make some potions (if u can), a swallow which increases speed of vitality restoration and Willow, which grants u immunity to stun and knockdown, if u cant make these potions ur really messed up, mate. atleast make sure ur on full health and maybe, you'll succeed after several attempts but it wont be easy even with this tactic, but better than just roaming around with no idea what ur doing. :l (drink potions before u enter bars)

2. when you enter the Zeugl's ''nest'' in sewers, make sure your ally follows you inside (sometimes they get stuck in tentacles). most useful is sigfried right there.

3. stand in the marked corner on screenshot as quick as possible and ur ally will follow u.

so tentacles will appear very close to you and will mostly attack ur ally, u will use group style silver sword and igni sign... they will die, zeugl will appear, you will change to heavy style, then you get close to zeugl, attack him, so does your ally (best if u use igni sign before you do that), and u will keep doing everything i said until victory.

don't forget to stand in corner after zeugl dives into the water.

i hope this tactic will be very useful to you :)