Use anat instead of resist for more damage. Only 100 tactics is really low.
Daisho for feint, keep counterattack or confidence active all the time. Make good use of evasion. Use greater strenght / agility pots.
Make sure you are as close to 45 dci as you can, add hla to the weapon if possible. Armored swamp dragon can also help alot here.
Or lame tactics, just do enough damage to get loot rights ( hit and run) and let the pillars do the work.
Also ,most people that use that 115-120 resist build have lower then gm parry to make room for 70-80 chiv and 110-120 tactics.
That lower parry leads to weapons with feint.
Tbh i did never do many navrey's on sampire because i was always getting unpredictable results, i prefer chars with healing there. But the basic rules are the same.