Originally Posted by
quras
Honestly, I would do both.
Since you can queue for FP's while doing other things you can work on both.
Heroics and story are all solo content. Just pick them up and go. Build up credits and mats.
FP's are the group content and through the group finder, queue for what you can do while knocking out heroics waiting for the group to pop. You can be anywhere when it pops and it will port you into the instance. Plus FP's is going to give you gear as well.
It's a best of both worlds kind of thing. A bit of solo and group play as you see fit for your time.
If you just want a fast grind, heroics are the way to go. Their solo and you just grind them out with no down time. There fast and pretty easy if you leveled your companion a bit.
FP's will take a little longer, you will have to deal with a group but you get good EXP and possibly some gear but maybe a bit slower.