Hearthpwn

I like control decks. I also like the Paladin class. I need some big heals. Lightlord?

F2p through and through. Already spent about 4000 dust this expansion. Disenchant Wild cards?

Or maybe i could stick with Lay on Hands.

Ragnaros is really great card in control or midrange Paladin. If you have Tirion and Tarim already, you should definitely craft it.

only 6 monts 

Ragnaros many times alone wins match vs aggro, definetely worth the dust

And also: DONT DUST WILD CARDS

I don't think I'm willing to DE the Naxx gang or GvG boys. Don't like the fact that the Lightlord is rotating out soon so I'm guessing Boom and KT are here to stay. Anyone willing to convince me otherwise? Am all ears.

"I like control decks + like the Paladin class" = a BIG yes, craft it if you enjoy playing Control Pally. Rags is an awesome card IMO. 

No need to craft a card that will rotate in very little time

A bit of hit and miss

If you play exclusively Pally then sure, Midrange/control pally really needs it.

If you play this and that then not sure, low shelf life and can to some extent be replaced with Lay on Hands

At least that's what i use despite having all other paladin legendaries. I rather invest in stuff like Alex or Andy tbh

Tirion is priority, if you already have then go Rag.

Lay on hands is a terrible replacement. The 8/8 body does far more in the aggro match ups than cards you can't play till the turn after. It's a solid craft but more aggressive paladin lists don't use it and I'd argue the more aggressive murloc lists are slightly stronger. 

Not necessary to play paladin.  Save your dust to craft the scummiest legendary of the next expansion.