Trying to book my first RTW.
I have a couple questions for xCAI.

I already have some booking when using webTool. I am based on US. Plan to position to CAI this Dec and spend 3 weeks from CAI to LAX and stay in LAX for 3 days, visit LIM and stay at home for another 5 months and visit middle east.

This is what I have so far.

1. xCAI -> xAMM -> xDOHA -> SIN (in Economy RJ/QR) I found D fare from EF but OW only shows availability in OW only
2. SIN - > xHKG -> PEK (CX)
3. PEK- > xHKG -> LAX (CX)
4. LAX -> xMAI -> LIM (AA)
5. LIM -> MAI (AA)
6. MAI -> LAX (AA)
7. LAX -> LON (BA)
8. LON -> AMM (BA)
9. AMM -> CAI (RJ)

1. I have no choice for my first segment CAI -> SIN. If I call CX or AA RTW desk, will they able to book CAI -> xDOH -> SIN? I already read many posts, it indicates fee is going to be pretty high. If so by how much?
2. Webtool does not allow me to end at AMM or DOH, will call AA or CW resolve this issue?

Any recent experience using AA? Will AA's price be similar as webtool?