WP speedruns are different from normal AOE.

1. HT-ROT spam (no DS) is the most damage/tp for 3-4 targets. This will lighten the load on normal dungeon runs where you have multiple extended 3-5 target pulls compared to spamming DS. For example, this is your go-to AK cycle. If you feel like burning TP, then Doomspike still works and is more DPS, but it will eat through your TP unnecessarily.

2. Doomspike beats HT-ROT spam for both dps and dpTP for 5+ targets. Note: obviously you still maintain the HT buff. Also, obviously you use ROT when you refresh the HT buff.
BLM).

3. For WP speedruns, your "only" cycle will be the default HT-ROT -> Doomspike spammm. The trick is that you need to time your cooldowns between pulls. Your cooldowns are: BFB, DFD, Invigorate. Never use Invig on a single target (boss). Never use DFD on a boss. BFB should be up for virtually every pull. Never use BFB late in a boss fight.

Also, your other DPS needs to not suck. If they suck then the DRG will run out of TP before the mobs are sufficiently dying. If they don't suck, you'll have sufficient TP to keep a good pace in the run (basically second best DPS from a DPS class behind BLMs).