Silent Singer is right, Stratics' Warrior forum is a great place for Sampire information.
Most discussions revolve around Prodo shard builds though... Hard to find threads focused on Siege template builds... The endless search can get discouraging and the frequent "play what you like" response can get annoying.
I am no expert, I know, sounds cliché, but here goes...
Not sure how everyone else builds their Sampire templates' on Siege, but currently my Sampire looks like this for Siege:
120 - Fence, Bushido
100 - Resist, Necro
90/120(+30 jewelry) - Tactics
70/100(+30 jewelry) - Anatomy
60 - Parry
60/90(+30 jewelry) - Chivalry
Reason for template: (my apologies ahead of time, I could not sleep and just felt like typing... And typing...) I hate being Paralyzed or Posioned, so having at least 100 Resist helps me with that problem. I personally don't see a strong need for high Parry, so I have just enough to add with Bushido/Fencing for the 300 skill points to lower Special Moves mana cost*. I choose fencing because with this template being so heavy on skill jewelry, I would not need as much Stamina on my outfit to achieve a 1.25 swing speed when I use Whirlwind(Kama, 2sec) or Armor Ignore (Kryss, 2sec). Sometimes I replace the Kryss with a Lajatang, for the Frenzied Whirlwind, the downside is it only leeches the initial hit, all the jazz that comes after lacks the leeching effect. I just love Frenzied Whirlwind, so any chance I can use it, I will.

If I could fit more Chivalry I would, but Enemy of One duration at 90 skill is adequate**. I went with more Tactics and Anatomy overall because I want her total damage output to be high so I can leech more. Necro for Vampiric Embrace for all the benefits. I prefer 2 tails on my toon, so I am human with 125/120/15. Six piece GM made outfit with all pieces having mana/stamina/LMC and hit point increase, 70/95/70/70/70. Currently Studded Hiro Sode, Gorget, and Do; with bone glove and Orc helm for 55 total LMC. I always wear Leather Skirts, so choose Orc Helm for +3. Don't copy my style! Just joking.

Ring/Bracelet has the three skills above along with Damage Increase and HCI. Since speed is not an issue for her, current Kama I am using for this template has Damage Increase/Mana Leech/Life Leech/Hit Cold Area/Hit Harm, and both Kryss and Lajatang has Damage Increase/Mana Leech/Life Leech/HLD/HLA.
The only special materials used are Crystalline Blackrock(all the skills) and Boura Pelts for resist on outfit.
Before the use of skills on jewelry, the template looked like this:
120 - Fence/Bushido/Tactics
100 - Chivalry/Necromancy/Resist
60 - Parry
Everything else pretty much the same with this template regarding outfit, Ring/Bracelet had DCI/strength and intelligence bonus instead of skills.
I hope this helps somewhat with your Sampire build, or at least a direction...
*Evasion increases your chance to parry, chance to block with Evasion is based on Bushido, Anatomy, and Tactics.
**Chivlary spells require 25 skill points above the minimum requirement to be cast 50% of the time, and 50 skill points above the minimum requirement to cast 100% of the time. Enemy of One requires a minimum of 45 skill points.