I would not consider nor recommend nor allow in-water recompression, unless the boat also had a full-face mask for the victim to wear, and safety divers were able to attend the victim as well with the full-face mask.
When diving at a remote location, it is critical to enhance the regular safety measures for the dive. Staying well within the NDL limits, with long surface intervals between repetitive dives, is crucial to avoiding a DCS hit.
For technical deco diving, extra hang tanks with deco mix, and staying well within the rule of thirds, is further critical.
If even after all this enhanced pre-dive planning, there somehow still occurs a DCS hit, then utilizing pure O2 AT THE SURFACE is the best, safest means of dealing with DCS.
Plan your dive, dive your plan, and plan for contingencies, while planning conservatively at remote sites. Darwin's prinicples will deal with those who fail to do so.