Originally Posted by
PArcher
EDIT2: OK, read it correctly now
SMN is much more complex than BLM. Yes, they base their damage on DoTs, but have several of the same problems as BLM, namely, they still have cast bars and moving disrupts their DPS. If they have to move while reapplying Misasma or Bio2...that can be considered as bad, if not worse than when a BLM has to move.
And then there is their pet, something no BLM has to worry about at all. Only bad SMN set their pet and forget about it; good SMN actively move it and use its abilities, and switch its target when needed. And if the pet dies, the SMN's DPS suffers until they can resummon and reposition it, hopefully not at the cost of applying a DoT or using Fester as well (which can make it even worse)