请教一个黑暗契约战锁的问题

[徒维]

各位大大好，本人新手一枚，最近在一个4E面团里车了张黑暗契约的战锁 但是由于黑暗契约多为暗蚀伤害，中后期怪物有暗蚀抗性的多如牛毛~特别是堕影冥界这些的位面，于是想请教各位战锁高手如何应对怪物的暗蚀抗性？
本团不开精华和龙书~SO 请各位大大赐教

[大头鬼]

已经11级了吗？典范级有个专长arcane admixture，可以往一个威能加关键字，你把你最常用的威能加个fire或者cold或者thunder关键字就ok了

其实这主要是滥强用来堆伤害的做法。。。不过个人对黑暗契约不太了解，不知道该怎么堆

[墨色玄]

Rod of Stolen StarlightLevel 7+ Uncommon
At your command, this rod infuses your spell with light from mysterious stars.
Lvl 7   +2   2,600 gp      Lvl 22   +5   325,000 gp
Lvl 12   +3   13,000 gp      Lvl 27   +6   1,625,000 gp
Lvl 17   +4   65,000 gp            
Implement: Rod
Enhancement Bonus: attack rolls and damage rolls
Critical: +1d6 radiant and necrotic damage per plus
Property
When you hit an undead enemy affected by your Warlock’s Curse with an attack power using this rod, you deal an extra die of Warlock’s Curse damage against that enemy.
Power (Radiant)  (Minor Action)
The next necrotic or poison power you use through this rod deals radiant damage instead of necrotic damage or poison damage.

Published in Adventurer's Vault 2, page(s) 35.