Quick Battle works, but only if you get lucky with the Devour Rotation. Otherwise, you may need to run more battles until you get the RNG you need.
Are you using a Titus team now? You have to have a different toon have the highest CD, because highest CD is the initial Devour Target. After that it is totally Random, so Titus could be second or he could be last. Obviously, you want him to be last or close to last.
I do build all my Hydra Toons with fairly high Res, plus I am using Diamant so one of the buffs that gets stacked is Inc Res. Oella will the same thing and is a perfect swap for Diamant in my comp above.
To get the most damage from a Titus Comp, you need to get the shields grown as quickly as possible and have as many shields as possible to grow: (1) You need someone in a chunky shield set, (2) You need Wixwell to open with his A3 and then priotize his A2 to grow, (3) If you have a Volcardiac Heart Relic, the Magma Shield is a third shield that can be grown, which will give a solid boost to Titus' Damage over time, (4) The new fusion (Pelops) will be the first toon able to cast a Magma Shield, so he would become Hydra Meta even w/o that nice Damage Mitigation.
I have Lamasu in 6 pcs of Impulse and Wixwell in Reflex to cycle their skills faster. I have a shield set on Diamant with 90K HP and a Volcardiac Heart on Hatter with 93K HP. Lydia is just in standard gear. If I regeared her to 9 pcs Protection or Feral, I could get more damage out of Titus. Titus is in 7 pcs Merciless for the Ignore Defense. If I can ever get him a good set of 9, I will try it but the extra turns could let him out-run his buffs, which already happens sometimes with Lamasu hitting him with her A3s.
What else do you want to know?