Runes of Magic US / AU

Scout would be a good third class choice, since R/S is good dps and D/S is one of the best druid healer combos.

As for the warden, Wd/R is a really nice warden, but R/Wd is just ok (imo). I honestly haven't heard much about Wd/D, except that they used to be the butt of a lot of jokes. They could be more viable now.

M/D is a good soloing class and D/M is a very good healing class, similar to M/P, if you're just going to put tp into the general skills, but M/R or R/M are ok. Hope this helps!

Druid as a secondary is pretty much only for healing for any physical dps class. The elite skills are pretty lame for S/D, R/D, and W/D. Wd/D is the best of the physical dps with druid as secondary. R/anything is a pretty good combo, I would advise against R/D though. D/R is the highest dps druid you can get and D/S is the easiest healing druid. Each combo has something unique about it and you may find you like one of the ones I mentioned not to pick. I'm partial to Warden, Wd/anything is a good dps combo.

i play a s/d/r...
i play s/d for instances/party stuff/lvling, it is a great class to play, not the best dps, but high survivability because it has 2 perm. dam reduction(if u get keen will), the druid damage reduction skill, and another dam. reduction skill attached to shot. the VA/devour blood skill it good because i can use my heals alot and will never run out of mana as long as i use VA, and since it is a party buff, none of my party will either, and they can spam all the MP draining skills they want. piercing arrow also gives u an aggro reduction buff. it gets a small PA buff from your wisdom(not all that great, but it helps a little). s/d also gets a crit rate increase that drains mana which you can have up almost 24/7 because devour blood will keep your mana up all the time. snake poison arrow is not all that great, it hits about as hard as WA or shot, but sometimes it has a stun or DoT on it...

now for d/s, my healer. d/s is a great healer because it gets a fast acting HoT, a aoe HoT, and a buff that allows you to heal yourself when you use recover on another player. d/s also increases max NP up to 15 and has a tiny mana regen skill that has no use really at all unless u have 0 MP. the last elite skill buffs and nerf's the best HoT that d/s gets, so there is alot of controversy about it, personally, i hate it and wish i had never gotten that skill.

i also play r/d for pvp(yes, ik it might not be as good as r/s, but it is sooo much fun). poison shroud scales well at lower lvls and is fun to use, but is kinda pointless at endgame...it also gets a crit rate increase that is good, and a skill kinda like premed but u can use it in combat and it gives u a guaranteed 4 crits in a row with a crit damage increase also for those 4 attacks, a heal that also increases PA/MA by 5% for 15 sec. it also has a buff for poison shroud and a buff to blind spot

well, this is my opinion and my opinion only, u can listen to it or laugh at me for it, i honestly don't care, but i hope it helped at least a little

As ElvenScribe noted above, R/M is an option as well. The reciprocate, M/R, is also good (and a blast to many that play it, I've heard). I'm a 58/52 R/M, atm, so not quite endgame, but at my level, R/M is both a blast to play and useful for DPS. Booby Trap is not only hilariously fun to use, but it's a short-range AEO that can do nice damage. At lvl 58 with a t6, +6 Peril Buster Dagger in my mainhand (which is an averagely nice dagger for that lvl), my Booby Trap can hit for about 15k. Trap Master allows you to use the trap twice, giving you 30k AEO damage. You also get a stun trap (stuns for 5 secs) and a decent (wouldn't recommend lvling very high though) AEO poison trap. You also get a nice DOT that lowers target's casting speed (PVP skill mostly) and a debuff that eliminates all of your target's beneficial effects/buffs instantaneously (PVP skill!!). Throw in a buff to your crit and you've got a well-rounded class that also does nice damage and is a blast to play. Haven't experimented much on my M/R side, but I've heard it's very nice/fun for PVP play and has decent damage as well.

M/R here, very happy with classes. Not an endgamer, not sure if any exists with this build, but overall very fun class to play.

You have all your mage spells, some not much usable rogues (need weapon switch), but very fun elites. Mostly based on dark magic, vampires themed. Cursed Fang is nice DOT, Kiss of the Vampire does some damage, but also 'gathers some life from your enemy'...

NIce part of Cursed Fangs is that you can run and shoot, without even to turn toward your target. (killed many balloons in SW with that) Had even some kills in SW with DOT, where I get killed and then person who killed me died as well...

So fun, and once you switch to R/M, fun with traps...