Hello!

I am a lvl 50 Paladin ilvl 120 and I am having tons of issue lately keeping aggro,
I know my rotations well and use them as they are appropriate
Dungeons(groups)

Shield Lob
Flash
CoS
Flash
then RoH cycling through the enemies

Bosses
Sheild lob
Spirits Within
CoS
RoH

I have been noticing, with the Shiva fight in particular, that even if i do multiple RoH combos I end up losing Enimity very quickly to the dps and occasionally healers. Any idea what im doing wrong? Thank you