Vile striker is my fawourite weapon so far fast deadly and poisionus what u guys think about vile and its upgrade
Vile Striker
It's bad, even compared to other normal weapons. Fun to use though.
DVS was my first 5-star sword (two years ago), so I have warm feelings for it. But it's not really very good. The regular attacks are okay, doing about as much damage per second as Leviathan Blade, but not very safe in Tier 3. The charge attack is very difficult to use safely, because it takes so long to complete, and it doesn't interrupt monsters very well along the way. But, as Atacii says, it is fun. Here is more detail.
The upgrade only increases damage, if you do care about dealing damage with your Vile Striker, you should upgrade it.
The reason why I have not upgraded my own Vile Striker, is that the Poison affliction is exactly the same from 4* to 5*
(Both swords have Slight chance of Strong Poison)
I don't use my Vile Striker for damage, but for inflicting poison, so I have not upgraded my Vile Striker.
EDIT: if you want a cool, green-looking sword you can upgrade your Vile Striker for that.
It's a great weapon to use when you couple it with a storm driver or voltaic tempest in LD, Also a very great destroyer of rocks.
I like it.
If I put my DVS into my loadout, I keep using it and I barely switch to other weapons even though I have 3 other weapons in the loadout.