Not many druids but druids are boring to play well for me... But anyways if your moving to Crom welcome and have fun, you don't need to play druids whatsoever unless you want to but just pick whichever class you want.
Druids - Heals, not very good at damaging on boss hunts unless you build focus and strangling, bees, lightning, etc. But very helpful with them heals. Nature touch, nature embrace, etc.
Mage - Damage output, very strong but needs lots of energy. Ice shards, ice blast, etc.
Warrior - Tanky, could be tanky but not lot of damage UNLESS you put stat points into strength. Pummel, gaint, etc.
Ranger - Dps, very good at healing with light heal and decent damage. Light heal, double shot, etc.
Rogue - N/A, rogues are strong but depends on how you play them, lots of damage (about the same damage as mages). Sneaky, shadow, quick, etc.
If you want a guide on how to build these classes go on "forums classes" and pick the class you want to look at. You'll see it.
Mage -
Ranger -
Warrior -
Rogue -
Druid -