Dark/spines

[Yoseph]

What do you guys think of a dark/spines tank?

[Justaris]

In general?   The two powersets don't really have any direct synergy but neither is there anything particularly problematic about the pairing.   It's perfectly viable.   It's hard to say more without knowing what specifically you're looking to get out of the build, as your question is a bit vague.

[Yoseph]

Was thinking mostly for tf's and regular missions maybe a bit of farming

[Justaris]

It's not going to be a top-notch farmer, but you should be more than tough enough and Spine will give you decent AOE damage output.   I just wouldn't expect clear times comparable to Scrappers or Brutes.    As for TFs and missions, that doesn't really say much about your goals for the build.

 

I'm going to assume you'll be mainly concerned with being a primary tank, so you'll likely want to build for typed S/L/E/N defense softcap with Tough and Weave from the fighting pool.    Make sure to get a Theft of Essence proc for Dark Regeneration.