Dhanyavaad Vivekji,
Here are my answers (attempted) to your questions:
3. Effect of afflicted karaka
Affliction from Ma may indicate problems due to landed property which may manifest by way of harsh speech.
Affliction by Ra may indicate problems due to money matters and greed. Combo with Ma may indicate disputes to debts.
Consequently all relationships mayl have these undercurrents.
7. Thithi lord Ve in own house is good. Relatinships initiated on thithis owned by Ve get protected to some extent.
I felt Sa is a weaker signifactor of marriage due to the following:
1. It is not connected to 7th in natala, only to 7th from UL
2. In its own nakshtra without any benefic connection
3. Placed in 8th from 7th lord Mo
4. Placed in 8th house of natal in D-9
On the other hand Me looks stronger due to:
1. Being DK, 9th and UL lord
2. Is in Ju nakshatra and is dispositor of Ju who owns 12th house of bed comforts also aspecting it.
CRS