Tiger doesn't and won't offer connections, not even with themselves. Tiger Singapore connects with Scoot. With SIA having majority interest in Virgin (and probably behind all these Tiger deals), you might see Tiger Australia connecting with Scoot.
Forget Bali. AirAsia X Indonesia is about to do flood the market. Perth to Bali is within range but you are up against AirAsia with half a dozen flights, why bother.
Nadi might work, Christchurch another possibility. Don't forget Tiger only has three bases, MEL/SYD/BNE.
Samoa won't happen, Virgin has a contract with the Government.
Forget new routes, they clearly stated its all about Tiger picking up Virgin routes. Its all about Virgin exiting these routes, Tiger going in, picking up the traffic and making money of the current traffic, rather than building up new routes which can take years to make any money.