6-max PLO preflop starting requirements.

[nigul]

Talking about hands like 8765ds - they are so unfrequent when compared to aces.
1. So Should I raise also with any double suited one gappers like 9875ds, 9865ds, 9765ds or only the one with a gap in lower end?
2. Same as previous question but in case of single suited hands
3. What about hands like 6678, 6778 or 6788. Are these total garbage out of pos even if double suited?