Till Giebel is the "Fish of the Week" --> klick me <-- and therefor also possible for newer Players to win here a few Tipps:
Giebel Trophy Chance is generally higher during evening till morning Time like 19:00-8:00, also the Size in general is bigger within that Timeframe.
Currently people do catch them decently at Mosquito at 67:57 see below.
The currently best working Bait Frequency wise is Semolina, alternative is Egg Dough (more common Carps) and Nightcrawler.
Boilie is currently Spicy Cherry 16 working. My uses setups:
Result from 2 Nights:
Good Luck & Have Fun