Heh, when I first started running HM BT I was still in my (slightly modded) LvL 40 PvP gear; it was painful.
I really can't remember the exact numbers I was running before things started to get a little easier. I got lucky with a few loot drops in my first Hardmodes and sort of snowballed from there.
I wouldn't overthink your stats too much for Hardmodes. Just do a few dailies to get some better item mods for your oranges, and stick to the easier Flashpoints until you feel comfortable. BT and BP are the two easiest HM's, in my opinion.
Edit: Another good option would be to run normal mode Directive 7, Battle for Ilum and False Emperor. These three Flashpoints are fairly easy on the normal setting and provide loot capable of sustaining you through some early Hardmodes.