I found my Prot paladin to be very hard to kill, even in raids when others seem to just get curb-stomped.

Paladins have a super ton of self healing that you can easily get up into the 2-3k HPS on yourself and still maintain threat. Seal of Insight, 3 holy power glyphed word of glory, and every minute you can pop that aoe super spam heal Holy Radiance. 20% damage reduction every minute. 20% with deathward every 3 minutes, and 50% every 3 minutes and a 5-10min 180k free heal with lay hands.

Ive put divine protection into my normal rotation so its always being used just like trinkets. We have 2 others to use when things go wrong. An unused cool down is a wasted cool down in my opinion.