How to make worming easier?

Yesterday my friend and I had to worm all the horses (expect the pasture horses, they got theirs when their feet were done) at my trainers barn (she was busy getting stuff ready for Nationals). It took us nearly 2 hours to do (granted there are over 50 horses) because with some of them it took two of use to catch the horse and then hold it still so we could get the wormer in their mouth. Now not all of these horses are hard to handle (most are pretty easy) but they know what the wormer looks and smells like and they run away from it. Some of them we could get by one person holding their tail (to keep them from backing up) and the other by using the pressure points right by the chin (not all needed this and some even knew that trick so it didn't work). With some we even had to use a rope either around their neck or turn it into a makeshift halter to keep them from throwing their head (one gelding had to have his ear held because we tried everything else and with a halter he was picking us up off the ground lifting his head and he is much taller than us). One mare just kept running circles in her pen (she thankfully gave up once we turned the rope into a halter and she struggled for a sec then realized we had beat her). Next time this needs done is there any way to make it easier on us and the horses? I really don't want to use the ear as a twitch again but it seemed to be the only thing that worked with two of them (didn't hold it tight but enough that they knew don't throw your head).