Earthbind totem helps alot when thunderstorming, since it greatly increase the time it takes to get back to you. If you can knock someone who is slowed off the edge in dalaran sewers you take them out of the fight for 7-8 seconds.

Why are you trinketing that aoe freeze thing if your only gonna eat a fear? (well asuming theyr not killing your paladin, but he should outlast them with losing) If they start nuking one your pretty much forced to trinket anyway and you have to eat the fear, and are you sure they are not taking down your tremor totems before fearing?

My bet is that they are destorying your tremors while your busy getting control over your shamans.

Like Colakongen said:

Drop earthbind/fire nova totem, you will be suprised how much this suprises people.
Start rotating thunderstorm the second they get close.
If the enemy team got a shaman ALWAY purge before you push your blow up button or the burst will end up in a grounding totem 50% of the time.
Once your EM/FS/LvB is gone they can rush you as much as they can, practice on getting kills without using EM. (I wiped a team with 2 gladiators and 3 challengers in under 30 seconds without bloodlust or EM, ring of valor and tbh im not sure what happened but it was a match i never will forget)

Your paladin needs more then gear and be high rated in 2v2, i used a guy who had 2300 rating in 2v2 he did not have a clue on how to behave in 5v5. He kept getting counterspelled,sheeped,spellocked,feared etc sure its impossible to avoid them all the time but with your pressure he should never allow a mage to sheep him if there are pillars around.

My 2 new healers are both amazing since they never eat counter spells,sheep or any cc apart from maybe a druid who comes from stealth and tro a cyclone on them.