Yeah... its all really subjective and varies a lot per tier and specific content.
Right now, I feel like Paladins are stronger than SKs. We are in the age of 1 cleric healing 6 man content, and the paladin POTL and Hots make that sooo much smoother. There are at least two fights where a paladin is almost required. And just on general raiding, paladins are amazing tanks, and then they get to keep a group hotted, WITH SPELL MITIGATION. That saves so much cleric mana, which massively outstrips any mitigation or self healing SKs have. SKs bring some dps to the table, which is nice, but in most situations I would rather have the pally hots and potl.
Combined: Warchief Rujik Moktar on 3/29/2015 in 456sec
Total
--- DMG: 6419469 (100%) @ 14078 dps (14078 sdps)
--- DMG to PC: 2074584 @4590dps
Solosolki + pets
--- DMG: 703233 (10.95%) @ 1566 dps (1542 sdps)
Aiesha
--- DMG: 678073 (10.56%) @ 1517 dps (1487 sdps)
--- DMG to PC: 89263 @261dps
Moraelin
--- DMG: 350969 (5.47%) @ 775 dps (770 sdps)
--- DMG to PC: 142940 @339dps
I will post this little piece of a parse, which shows myself, and Moarelin being pretty badass, but this is a very speicific fight, that offers a buff to two players dps. Also this is an enchanter, who has to mez a bunch of mobs for 30% of the fight, dampening, curse, etc and did NOT get the super dps buff Moraelin and Solosolki did. This is why they are the God-Mode class.