AJI is not as bad as most make out. Most are the same though... not as good as your first told! AJI has the most LAE's under contract now. They have people in with SIAEC and MAS. MILCOM were slightly better for SIN contracts years ago but not sure how much they have available.
Kristec & co are MAS only.
If you go direct with SIAEC you'll get staff travel and paid leave etc. You also have to do "lieu" days - One unpaid 12hr shift every 6 weeks, overtime thereafter is at single time. Contract agency is better as your purely power by the hour on a better rate with no lieu days, though if your sick and can't work then you don't get paid!
Junior LAE with SIAEC is less than 5 yrs (2 stripes). Probably less pay too! After 5yrs they get an extra half stripe.
All expat positions are generally 2yr contracts renewable. No such thing as a permanent position.
Aviation Jobs, Airline Jobs, Air Jobs, Jobs in Aviation - AviationJobSearch.com have most of the advertised positions for SE Asia.
If you have B777 and A330 with PW4000 then Vietnam Airlines are always looking too..