ok so it seems the Respark has the shortest time for delay.
Thanks
I have a respark regenerator that I just can't seem to replace. Charge just over 1000, 40% recharge rate, 3 second delay and a 50% life regeneration. Paired with thick skinned I feel pretty tough but every now and then I'll still get lit up.
Anything with a faster recharge rate than Respark has a longer delay that more than offsets the difference. You should look at the combination of delay and rate when picking your shield.
If someone shoots you at 4 seconds after your shield breaks with a Respark, you have 40% shield. If someone shoots you at 4 seconds with a Tachyon or Hurricane, you have no shields, so that faster recharge rate isn't doing you any good. By the time you hit the 6 second delay to start recharging one of those, the Respark has already completely recharged.
I just checked last night and currently have a Respark Regenerator II D
1087 Capacity, 40% Recharge/Sec
3 second Recharge Delay and has +25% HP regeneration
I have heard of some that have over +60 HP regeneration, just have not found any yet