People talking about the grind in the 350's being bad scares me. I'm in the mid 40's and I'm seriously feeling the grind. Is there something else I should be doing besides grinding faction packages/using 3 of coins? I've done the gjallarhorn quest and have a 350 artifact. Unfortunately I'm low on legendary marks and can not buy 350 gear at the moment.
I didn't find the grind to 365 to be bad at all. Almost everything will reward you with something relevant:
320 strike
Heroic Strikes
Nightfall
Omnigal Farm
CoE
CoO
AF
ToC farming.
There really is plenty to do to negate the feeling of grinding.