FCO - ICN,
I've now wittled a list together.
What are people's opinions on what I've gone for and any alternative options that might be better?
FCO-SPU-ZAG-IST-ICN _ ICN-NGO
OU-OU-TK-TK-OZ
DHC8 DHC8 A321 A343 767

(Unfortunately the direct FCO-IST flight would land more than 24 hours before the IST-ICN departs, and there wasn't any availability on the next day).

Alternatives such as these exist:
TK (C) FCO-IST-BKK-CAN-ICN (A343, AB6, 777)
TK (C) FCO-IST-BKK-HKG-ICN (A343, 333, 333)

TG (F) FCO-MUC-BKK-CAN-ICN (744)
TG (F) FCO-ZRH-BKK (A346)

Or the round the houses routes:
MS SQ (C) FCO-CAI-SIN-ICN
TK SQ (C) FCO-IST-KWI-SIN-ICN

I'm trying to depart on a Saturday night for arrival on Monday at the latest. Happy to consider more creative routes if it permits a stop somewhere whilst avoiding expensive accommodation. (Don't need any more time in IST though).