Well, for which primary would benefit most from permaHasten levels of recharge, I dunno.
Probably Dark Melee, for max (if not perma? dunno how much you need for perma SD) uptime on Soul Drain.
As for max recharge /regen survivability...well, I would think worse than a softcapped Scrapper. While it is great to have perma Dull Pain and Recon/IH/MoG recharging fast, you know what they say. An ounce of prevention is worth a pound of cure.
To that end, if you're shelling out for permahasten levels of recharge, you'd be better off getting some defense (melee would be best). For your heals to keep you on your feet, you've got to be on the ball about using them. Time spend patching up your hp bar = time not spent smashing dudes.
Support Guides for all Corruptor secondaries and Fortunatas
The Melee Teaming Guide for Melee Mans
The Melee Teaming Guide for Melee Mans
Katana goes well with Regeneration does great DPS at high levels of recharge and gives Regeneration a nice defense boost, and its average at PvP.
Virtue: @Santorican
Dark/Shield Build Thread
I do mostly PvE but do wander into PvP zones on occasions. I was wondering which primary would benefit most from a perma haste /regen build. Also, I like to know how survivable is a perma haste /regen build. Would a perma DP scrapper (with its fast-recharging heals, IH, and MoG) be on par with a soft capped defense scrapper (in PvE)?