Mouse over macro:

/ac (Cover) <mo>

Macro for covering a target your enemy is hitting:

/ac (Cover) <tt>

Macro for covering your target:

/ac (Cover) <t>

Macro for taking your bottom lip and slamming it against your top lip:

/ac (STFU)

The skill is exactly as it needs to be. Trouble using macros on a PlayStation? Hmm, seems like an issue with personal preferences to me, not an issue with the game. A skill that cover ALL the physical damage of one target will be much better than just taking half, even if it's for the whole party. What would I have done with a 50% damage redirect in T13 after my Warrior off tank just got pulverized to 1 HP by Bahamut's Ahk Morn, and immediately after his Holmgang dropped, he got killed by a stray dragon fart that I was only able to redirect half towards me? Too weak. Not OP.