Now the full Set give zero %block (maybe 5%? idk), it's definitely harder than it used to be.
-The confident pro strat is to keep 1 of his guards alive, run around him and cast the Set's purify whenever it's up. Not recomend though, cuz the dude is a fuck wit , he constant moving n spammin. Get too close ur gonna get hit by his broadsides which melt your armors and life in secs. Server desync doesn't help. Don't do this if ur not confident or internet is shitty.
-The casual approach is to walk in and out of combat. Bait him to pounce on you, purify imediately, run away quickly. Clear adds/wait 5s, go back in and repeat the said process, rinse and repeat. Remember packing lots of HPs and also watch out for time limit.
*General knowledges:
-The whole fight revolve around about managing the guardmen, timing and baiting the boss pounce to land purify dmg.
-Pounce: Cooldown timer ~5-7s? Valthek only pounce when you are far as 1. screen away. When you stay close, he will cast his other skills instead.
+The thing to keep in min: pouncing will always put him top of ya, no matter where he standing from. So when reaching the bonezone (his HP bar show up), hover mouse just slightly Above your char and hold shift + Purify fire button (the shift is to not mess up you position if you mistargeting him, ) Maybe also prepare for a mouse flick to the left and right because he can walk right after he pounced.
-Guardmen: Lure and kill most of them. Let 3-4 guards alive so maybe they can be of help in the future when running for ur life around the arena. Ideal scenario is having only 1 Guardman when approaching the boss pounce zone and the said guardman doesn't come from/approaching you from above , or staying too close to you because he can mess up ur Purify at the moment the boss pouncing on you. Also, guardmen hits can interupt your purify.
-Boss lightning projectiles almost never 1shot u (Deal ~10k dmg). Can be blocked (and avoid?). Keep life bar full and ur good, just dont get hit by his shadow flame prior. (Maybe the nerf in dmg is why they remove the +75% block from set)
-U can get unlucky/Boss being a smartass: Sometime the boss decide to cast his shadow flame first before pouncing on you. If you choose to stay and purify him, u r a BBQ meat. Dude just run and wait for the next chance.
-Fast movement Speed and Thic life pool really help