Zorro

We are going to SIN & BKK as a family (SEN, FTL, 4 chd no status), and I wonder what the rules are, especially in SIN & BKK, regarding Lounge access and priority check in:

Routing:
Sector 1: MAD-FRA 2x C award, 4x paid Y, stopover in FRA 7 hours
Sector 2: FRA-SIN 2x F award, 4x paid Y, stopover in SIN 3h
Sector 3: SIN-BKK, 6x paid Y
Sector 4: BKK-SIN, 6x paid Y
Sector 5: SIN-FRA, 2x F award, 4x paid Y, stopover 10h (same arr & dep date)
Sector 6: FRA-MAD, 2x C award, 4x paid Y

Sector 1 (MAD): Check in LH in MAD at C counter, reason C and SEN, incl. children
Lounge access: 2 C passengers and 1 guest each, 2 chd stay outside, since MAD has no LH lounge, only genereic airport lounge

Sector 2 (FRA): FCT access for all of us, reason is F Class flight, includes spouse and chd.

Sector 3 (SIN): check in in transit at SIN for TG flights priority check in as *G, even with 5 more pax who are not Gold? Lounge access for 6 pax, only 1 *Gold? How many guests/family are allowed?

Sector 4 (BKK): Check in at the TG *G counter for 6 pax allowed? lounge access?

Sector 5 (SIN): Check in for 6 pax at the LH F counter, SEN benefit allowed as family. Lounge access to the SQ Lounge 2 F pax and 2 guests, 2 chd have to stay outside?

Sector 6 (FRA): Departure from the FCT allowed because arrival same day on LH F, departure on LH, and family benefit allows the 4 chd as well.

Did I overlook or misinterpret anything?

Thanks for comments and corrections

Zorro