Unless you intend to pull down you're engine down again #3 will be the only one applicable.
For response/earlier boost: Adjustable cam gears, cams, different fuel, lightened flywheel/other parts, diff gears, more tuning, larger dia throttle body, Bigger dump pipe etc. HKS or someone make an exhaust valve thing that allows some back pressure at lower rpm to help boost build up, as the volume of gas flowing through increases the valve fully opens and operates as a normal straight though section of pipe. Some people have had success with these on very laggy applications.