Ya. Deploy those few K380EB on 190 for short working trips
between CCK and Bras basah. Btw i would make it a semi-decker,
similar to those two axle coaches in MSia, but instead of it being
luxurious like those in M'sia, it will have more seats and regular
bucket seats or school bus seats. Surely with its 380bhp engine, it
can still speed given the load?
If you dont want a semi-decker, a smilar
configuration to the Causeway Link MAN 18.310 will do. Infact, i
love Scania Manual, especially the "tskk tsssk tssk" sound (dont
know where that sound came from, probably is the
Hydraulic/Pneumatic clutch).
And if its true, the trip would be:
Start from CCK-->along the same route of 190 and will call on
all the stops at BP covered by 190-----> bus will only stop at
Tangs shopping bus stop as well as Far East stop------> Plaza
Sing stop------->loop or u turn at Bras basah----->then the
way back. 
Manual buses are only useful for short working trips. Because if
the bus stops and go as frequent as the city buses, the clutch
would have worn out very quickly, which also explains why some
garbage trucks that collects waste from HDB blocks had auto
gearboxes, because it also had to stop very frequently. An auto
gearbox eliminates such clutch probs.