Hello, im am stille, your resident semi-expert on DDO. Lately while running around i see a lot of builds that are perfect examples of BAD multiclasses, such as a 10/10 sorc/cleric. In this thread, i will attempt to explain when and how to multiclass.
Remember, general advice, if you are a new player, a pure [insert class] is a good, solid build, that is simpler to play.
What is multiclassing?
it is taking a class different from your base class, any character can have levels from three classes.
Why are some multiclasses "bad" and some "good"? how do i know? when should i multi?
Remember, when you play ddo, and your character is leveling up, he/she continually gets stronger and progresses, s/he will fight stronger monsters, and more of them.
This is why multiclassing can hit so hard. A character is more than the sum of his or her levels, and each multi level must progress your character. A level 20 fighter will wipe 3,4,even 5 level 10 fighters with ease, he is not 2 level 10s, he is more. A multiclass must also be stronger than the sum of its parts
Lets go back to that build i saw, the 10 cleric/10 sorc. This build is severly flawed because the cleric adds nothing to the sorc, the sorc adds nothing to the cleric. So the result is not stronger than its parts. Your result is the equivalent of someone with the skills of two level 10s. He cannot outheal a lv 10 cleric, he cannot outcast a level 10 sorc. His only advantage is some sp. In short, he is great for level 10 quests, but not the Tower of Despair. Against a level 10 cleric+ a level 10 sorc, he is evenly matched, maybe at a disadvantage.
So lets move to useful multiclasses, a great example being, say, ftr 12/barb 6/rog 2. The fighter adds Kensai II, the barb adds barb rage, the rogue adds both sneak attack, and evasion. your result is a str boost kensai II fighter with a barb frenzy burst with additional sneak attack,and the ability to dodge spells. A lv 12 fighter, a level 6 barb, and a level 2 rogue would die in seconds.
So lets move to common/ useful multiclasses:
Multiples of 6 of given classes- Give prestige enhancements, powerful enhancements that increase your attacking, etc. ability. Be sure to see that these have synergies or help your existing character.
note: all Prestige enhancements have various requirements, check them
Rogue 2- gives evasion and sneak attack damage, also, on the levels in which you take rogue have UMD (Use Magical Device) as a class skill, which is also handy. (Use Magical Device has the capability to give access to many scrolls like teleport and heal with enough points)
Monk 2- gives evasion and 2 more feats, (bonus feat can be used on toughness too)
Various levels of rogue- Usually applies to a deeper splash like 7 rog, at certain levels rog get more sneak attack damage
Various levels of monk- mostly useful if monk is your main class, at certain levels monk fist damage goes up.
2 of other classes- sometimes happen, most commonly with a 16/2/2 bard, not advised unless you read up on them a lot
1 splash of other classes- most often happens with fighter or barb (who give basic haste boost and rage boost respectively), usually part of a build with odd (as in not divisible by 2) class groupings, mostly the rogue 7 or rogue 13.