First off we should have a moment of silence for Flash, Bulwark, Awareness, Convalescence.
50 to 60 is going to be pretty boring to honest. There just isn't much there to make you enjoy the class, but the dungeons are some of the best in the game. Since they have changed the way Oath is used from HW on ward and some of the skills for that time are completely different or moved so far from when they were first offered, it's going to be very meh. Sheltron weave during trash pulls and large incoming hits when you have the oath. DON'T SIT ON OATH! Cover is trash don't waste the oath. Goring Blade is your friend, and use it in your opener with fight or flight leading. Spread out your Ramparts and Sentinels.
60-70 same thing but now you have Holy spirit for your burst phase. Always remember to use fight or flight before encounters and w/e it is available as goring takes advantage of added potency. Always put goring on the boss/mob BEFORE you start your requisite phase. This goes for your opener as well. If you don't you'll lose out on some decent DPS. Should be Goring -> Royal -> Royal -> Goring. Learn to weave Circle of Scorn and Spirits within during your requisite phase while casting Holy Spirit. Wings are nice if your rampart or sentinel or on cooldown, but it's usually used for raid wide or stack markers.
70-80 your rotation stays pretty much the same for boss encounters only now you have Atonement. Should be FoF -> Goring -> Requisite -> Holy Spirit/Circle x4 (weave CoS and Spirits) -> Confiteor -> Goring -> Royal -> Atonement x3 -> Goring -> Royal -> Atonement x3 -> Goring -> requisite phase repeat.
Just opt for Goring if you get lost during mechanics just keep that dot up, weave CoS and spirits always. Riot and Atonement will get your MP back in time for your burst phase. Don't save spirits within for MP regen during atonement burst, just weave it whenever it's up.
I suppose you have to learn how to commit with Paladin. You can use requisite and Holy Circle during trash pulls, but don't change to Holy Spirit. Don't OVER AOE with Eclipse and Prominence as you'll starve yourself on MP for requisite phase. 1 or 2 is fine to pull agro, but then go back into your single target rotation for atonement and riot mp regen while opting for Holy Circle for your AOE.
It is by far my favorite tank class next to Dark Knight and Paladin is pretty sturdy as well.