Hi,
In my opinion, any remedial measures including Gems stones should be done considering the 1H, 5H, and 9H and it's Lords..
Why? 5H poorva Karma Punya, children, Happiness, fortune Lottery luck, lady luck etc... When you wear a 5H lord's Gem it activates both 5H and 11H 11H of gains,
9H Dharma, prarabdha Karma, House of Luck when you activate 9H it also activates 3H. 3H is Upachaya, house of growth public image, etc..
1H Lagna the native himself/herself AND you know which House it Activates?

i.e. 7H your partner!!
Hope this helps
Regards
ChanDubai