Sorry, ranger damage output is EASILY as much as a DK. And Sandbox, you talk about malforms, but have you actually ever tried getting high level malforms? I tell you now, its not a cakewalk, and most people give up before they even get them!
Rangers have fired weapons for a start, even without taking the archery stream, this means you MUST get missile immunity. Guess what, these scrolls cost alot and don't last very long, so I hope your RICH.
Fired weapon damage is largely unblockable. Unblockable damage is a HUUUUUUUUUGE bonus. What it means is that you can play a huge defense, and rely solely on fired weapons for damage. I've seen battles won through bashes alone, and fired weapons are certainly more damaging then these (and as a bonus, you take NO LAG from it, its basically like the old internal damage shadowstrike) Use of missile immunity can nullify this issue vs non-archers, but as already noted, it is expensive and not viable for alot of people. You can get a gyvel potion to cure blind for 500, but need to spend THOUSANDS on a missile immunity scroll, to protect you from arrows.
I've fought alot of rangers. Ogre, feral, stone giant, halfling, elf. They are all capable of massive damage output, infact, Lianthias (elf) layed down ALOT of hurt! Rangers of the correct path can also quite reliably lag, provided they can see. I CERTAINLY think a ranger would 'tool' mages more then any DK or warrior will, damage wise. Get an invoker or battlemage or something, fight it with a ranger, dk, warrior and a zerk. I bet you damage output from a ranger and a zerk would end up pretty equivalent.
Herbs alot better then those other healing spells and camoflauge cant be underrated. Not all classes have the ability to stop a ranger from hiding, in which case, what do you do?
Ninjas and thieves can hide, but I assure you, if you bash lock them with a warrior, they are dead. I have a beef with rangers being able to dual wield two handed weapons (in either hand, none the less), but thats a completely different problem. Dual wielding a disarmable two handed weapon behind a cursed 1 handed weapon is just garbage if you ask me. Two handed weapons with a high AVG are usually disarmable for good reason, this completely shifts the balance when they can no longer be disarmed.
Thunderstorm can be ABSOLUTELY DEVASTING when used in the right circumstances. I remember getting completely massacred by Druggin (halflng ranger) as my 1.0 chaos leader DK, solely because of thunderstorm. Its also how Faye killed Philantees, with help of 12 rounds of pure lag from her stupid dragon (didn't get to enter a single command, apart the one I entered to initiate combat). Then you've also got insect swarm, which can also prove rediculously powerful.
My 20c, for now.