Reckoning + The Surrender

I am currently running the following two skill sets on 1H-Axe and Sheild:

Axe:
Reckoning - Endurance Charge - Stun

Shield:
Tempest Shield - Cast w/damage taken - Enfeeble


I just picked up The Surrender. So now, the shield itself has lvl 30 reckoning on it already, so I was wondering if I need to shuffle around some skills as I am not sure if I am getting double reckoning or if they are effectively sharing a cool down and interfering with each other.

I was reading somewhere that the reckoning on the shield would benefit from socketed support gems, so was curious (provided I am NOT getting double reckoning) if I should move the End. Charge and stun to the shield along with something in addition to them or not.

Forward looking I as also curious if moving to an elder or shaper axe would benefit from the new or modified skill setup, or if I should just skip any funky mods and look for pure phys dmg modifiers.

Reckoning shares cooldowns. Having two Reckoning set-ups doubles the chance that Reckoning will trip, but when one does the other is locked out until their mutual cooldown is over with.

The Surrender's high-level Reckoning does indeed benefit from support gems in the shield. You effectively gain a 4-link lvl 30 Reckoning, which can be quite nice, and you do not need to link the slots in the shield at all. Note that with your given set-up (Reck, ECoMS, Stun), you've lowered stun threshold but also not used any damage gems at all, which means the skill has a hard time meeting that lowered threshold anyways. You may want to consider Reck> ECoMS > Damage > Damage; higher damage means more reliable stuns overall, and also, y'know...more damage :P

Other folks use it as a utility thing with Curse on Hit > [Curse] > Blind/Cull, which is also a cool idea. No End charges there, but those are reasonably easy to generate via other means. Up to you which sounds most useful.