Hi, while the post above me has correctly quoted the general priority of stats for DRG, I highly recommend that if you intend to attempt to gear in an optimal fashion you should also attempt to play in an optimal fashion as well. In spite of its reputation among people, the Balance hosts the most up-to-date and theoretically sound guides for FFXIV and would strongly recommend you join if you wish to learn more about gearing and DRG play in general.

FWIW DoT scaling on SKS/SPS is not a reason that it's taken; it's usually to hit specific GCD tiers or in the case of some jobs their strongest attacks scale with it so it proves advantageous to take a large amount of it. SAM, for example, wants to take a specific amount of sks to allow for certain looping rotations, and some BLM builds take as much sps as possible to maximize the amount of Fire 4's they can cast over the course of a fight. A job like SMN, for whom DoT's are a major portion of its damage, actually only takes a specific amount of sps on some builds to ensure that the timing for demi-primals isn't so tight. Otherwise, SMN actually avoids SPS as much as possible. DoT's are not a good indicator of a job liking speed stats.

Furthermore, I would avoid using stat weights that are provided without a methodology for their calculation. We have, as a community, moved away from using stat weights because 1. calculating them is dubious due to the fact that stats in this game are tiered (that is, each stat is a stepwise function wherein a bonus is gained every n stat points rather than scaling continuously with every stat point) 2. usable stat weights require you to calculate them for a specific stat snapshot, meaning that stat weights only have value as a comparison tool for specific changes in gearing. General stat priorities are much sounder way to guess what the value of changing to a specific piece will be given they are the same item level, as well as inform how to meld materia and get it mostly correct.

In closing: stat weights are fake, stat priorities are real, the information in Renkei's post is good except for the advice to not join The Balance and their use of stat weights.