I've read several posts on this topic, but feel my situation is a bit different so thought I'd add another post... or I'm just looking for some comforting assurances

I live in the US and work for a Norwegian company. My company has been incorporated in Norway since 1996 and has annual turnover of a few million USD. We have distributors throughout Asia Pacific, including Singapore, and do all our business through them.
I, along with my family, will be relocated to Singapore in order to offer better support to our distributors in the region, including in Singapore. The idea is to be in the same time zone as most of our customers in the region and also to save time/cost in visiting them (I'm getting tired of flying across the Pacific....)
My "daily work" will be meeting with existing/potential customers, as well as our distributor in Singapore, to help them define product specifications, answer technical questions, etc. I will NOT, however, engage in any trading, quoting, importing/exporting of anything, holding of any kind of inventory, shipping/receiving, invoicing, hiring of staff, etc. I will also not generate any type of *direct* income as we will not be selling anything. All of these activities will be done by our distributors, which are established corporations in Singapore. In other words, my job will be merely to serve as a technical resource that’s locally available to our distributors (as they seek to gain business for our Norwegian HQ) and customers (as I help them use our products).
Further to the above, note that we intend to maintain our presence in Singapore for a maximum of 3 years. After this time, we will decide whether to fully incorporate in Singapore, hire local staff, etc. Until then, it will be just myself working from a non-HDB home-office.
So given this information, which of the three types of entities (RO, Branch or Subsidiary) would be the appropriate entity for our case? My bosses are fairly green at this type of endeavor and we also don't have a corporate relocation company to help me out, so I'm trying to keep everything as simple and as inexpensive as possible.
Much appreciate any wisdom from the pros!
Thanks.