Thanks to the introduction of mercs in the game these "useless" skills can serve a purpose.
Imagine fighting a guild war and bam!!! 5 mercs appear out of the blue on the opposing teams lineup. ..whoa!! They are nukers too, all synchronized to deliver their blasts to a single target. What do you do? (besides scream no fair

)
Get your best tanker, probably a blader with his br18 shield, have him cast firewall and then use iron wall shield inside it. While the mercs attack him u use 3 or so guys to kill the owner of the mercs. Sure the blader might probably die but with that 5 seconds you should be able to target and kill the mercs' owner.
See.....those skills arent so useless afterall.
