Hi, so, to disclose, I have only returned back to UO myself after 7 and a bit years away. However, sampires seem to be fairly consistent from when I left compared to now. Now, regarding fencing, it would absolutely work, for example, leafblade gives you AI and there are WW weapons. I think traditionally those go for swords because it has the highest output dmg. I have a fencer Sampire, but I just prefer swords because the damage seems to be more consistent and slightly higher with swords.
Bushido is a must for evasion and confidence, so I personally recommend making that 120. Now, the parry. From what I have found online and from what other players are using, it becomes convoluted. It appears that a lot are running with 60 parry; parry is needed for evasion to determine amount evaded.
Magicresists... I personally always run resists, but it has become an option to swap resists with anatomy. However, it would be based on play style and what you're actually doing at the moment. Anatomy will help with higher damage output.
I have several sampires, but the main two I have are basically the same with subtle differences and I don't see much of a difference.
My second Sampire runs with 120 Parry and 100 resits with 15 chiv on ring so I am at 80. I haven't noticed a difference between them. Ultimately, you want to remember that you heal based off of the damage output.
There are variations that will be used, but this is my experience/playstlye.