The White Whale was the first team to go at a consistent 2:1 ratio.  It can be done in 2 ways, with many variations since first discovered.  The two primary methods involve a speed booster (typically like High Khatun: 15% tm boost + 30% speed buff, though there is a version for champs like Lydia without the TM boost) and either another speed booster or a buff extender.  Both are listed below.

with Buff Extender

Speeds will be less if you use a Speed Aura

268 – Speed Champion (High Khatun/Apothecary/etc)
245- Buff Extender (Sandlashed Survivor/Valerie)
244 – DPS
214 – DPS / Debuff Blocker (3-turn cooldown)
196 – DPS / Cleanser

UNM / NM Setup:
Speed Champion can auto*
Buff Extender can auto*
Debuff Blocker has an additional 2-turn delay compared to the others if you want to align it with buff extensions
*Equal delays can be added to both the speed buff and buff extension to adjust where in the cycle you want buff extensions.

To avoid time cleansing the stun with Valerie and HK as the lead champion, both Valerie and HK need a 1 turn delay for their abilities.
Valerie’s AI is trash and must be run on manual  must be set in the skill priority.

There is plenty of leeway when it comes to speed.

with 2nd Speed Champion

With Speed Aura the needed speeds drop considerably. To be affinity friendly will need Cleanser such as Doompriest.  Debuff blocker can block either stun or affinity debuffs (if 2 turn duration) not both.

268 – Speed Booster
244 – Speed Booster
225 – DPS
214 – DPS / Debuff Blocker (3-turn cooldown)
193 – DPS / Cleanser

Setup:
Fast Speed Booster no delay
Slow Speed Booster 1-turn delay (First use on Turn Count 1)
Debuff Blocker 1-turn delay (First use on Turn Count 1) – will block Stun Only

Both Speed Boosters need to avoid being stunned.
Fastest champion goes last in turn order.

Cleanser can go in the 193 slot; works vs Spirit.