Secondary Proffesion Choice Help Needed.

I am getting facton soon and want to make an Assassin. The issue is I'm not sure whicn secondary to use. I had a few ideas but noticed very bad draw backs. Such as...

As/Mo
I was thinking of using Balthazzar's Spirit with the Assassin's Crititcal Eye to gain a massive enegry recover so allwoing combos to be unleashed over and over again and allow minor healing. I think this class would be good and by ignoring Protection Prayer, and Shadow Arts I will only need minor Points in Healing And Smithing and drop the rest into Critical Eye and Dagger Mastery. The issue is without Devine favor would the fast cast healing spells reallybe worth the time? Then if my enchantment is broken I could end up taking massive damage and loosing my energy gainer.

As/Wa
I thought about it but figure it would be over used. The assassin's potenaily high critcal ratio and deadly combo mixed with the warrior's stances could make Wa/Mo a thing of the past I think. But I'm not one to use a popular build takes the fun out of the challange to try and beat the good ones.

As/Ne
This one would be simply a Shadow Arts or Combo/Vamp/Touch to help drain and enemies quickly and steal thier life for a deadly and helpful heal. Though energy cost will kill it so I don't think it would of much use.

Which one of these do you hting would be better, or do you have an example of effective build? I'm gratfull for any and all help and tips given.

I ended up going A/R for Troll Unguent and Apply Poison, although lately I've been considering just focusing on my Assassin skills instead. Not that those skills don't help, but it might be more useful to have extra space for more attack skills so you can do a combo more often, or just incase one step of your combo is disabled (like a few times when my lead attack was diversioned :/ ).

edit: As an afterthought, are you more going for PvE or PvP?

I do mainly PvE, I though of an Assassin Ranger aswell and get some daggers with legthen posien sences it can be very useful in both. So I may try that with troll. Thanks for the idea. I will go with either As/Mo or As/Ra.