Ezra isn't a must here but you can use his shield/debuff in any free AP slots you have

Round 1:
- select a lucy skill to upgrade. Only use the upgraded card.
- move ulrich card
- play ulrich s1
- play ulrich s2
(The aim is to give ulrich 3 moxie by the end of this turn so if you get lucky with rng you can merge his cards and have a free AP slot. Make sure you at least play the skill card with the glove illustration.

Round 2:
- upgrade 2nd lucy attack and use 2 lucy cards
- 2 ulrich cards again

Round 3:
- 1 ulrich card
- ulrich ult
- 2 lucy card

(Ulrich's ult will charge the field to max this round so its up at the exact time lucy gets her ult. The lv 3 field also automatically gives him 3 moxie

Round 4:
- lucy ult
- lucy card
- 2 ulrich cards

Round 5:
- ulrich ult
- use as many lucy cards as you can

The pulsing field will then reset again, so just repeat! Ezra euphoria will automatically grow mushrooms at lv 3 field so don't worry about it too much.