Non iksar necro - reroll or fail?

[Arterian]

I'm having a serious dillema.

I was a dark elf necro on live and at the time I was oblivious to the advantages of iksars and their regen.

Even when I started here on P99, iksar regen wasn't something I was thinking about. Now I'm lvl 43 on my dark elf necro. At spectres in Feerrott I'm feeling the pinch of balancing my mana and health due to the fast pace of the camp (trying to kill as many as possible per rotation). I find I have to cast vampiric curse every pull and throw in lifetaps with some regularity to not drop below 40% life.

I can't help but think an iksar would be spending less mana on those inefficient spells. My challenge is:

1.) Am I misguided in thinking an iksar would have a very different experience at 43? It looks like the big regen numbers don't even kick in until the 50's.

2.) Is it night and day? If it's a nice convenience but not life changing, playing 43 levels over is really unappealing.

3.) I'm not a big fan of the iksar model. DE are my swagger.

I realize this is a beaten to death topic but because I can't actually experience the iksar regen at 43 for myself, I was hoping for some clarity, particularly from those who may have played both.

Thanks for any insight!