Which travel insurance is the best for travel in Asean countries?

Travel insurance are pretty cheap/affordable these days, be sure to make use of travel insurance comparison sites like GoBear. Personally, I'll go for FWD as it's priced competitively and offers sufficient coverage. I've filed a claim for medical expenses after I came back from my 2 weeks Taiwan trip and the claim was approved and paid out in a timely manner via bank transfer too.

Have also purchased from Etiqa and NTUC before but have not made any claims. I like Etiqa's real-time flight delay claim feature as it'll file a claim automatically if your flight delays.