Rahu& ketu better in dushtana/trikona (if exalted/debeliated)?

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OHM SAIRAM

rahu & ketu are known to be malefic usually ,but

if they are exalted

rahu-in taurus,virgo

ketu-in piscies, scorpio

 

in a chart does they do any good?

also if thay are in 6/8/12 houses its good?

if they are in trikonas 5/9 its bad?

are they are better in 2/11 houses (dhana sthanas good for rahu)?

where in the horoscope they are good?

 

ss ramesh