As far as the need for special crimpers for heat shrink terminals I found the following. There is no mention of special crimp pliers? I can't imagine why you would need them but........
Ive just done a few butt joints on 2.5mm wires using glue/heat shrink crimps and my ancient standard crimpers were fine - at least the wires stood up to a good pull afterwards
The crimping tool for heat shrink crimps is slightly different to standard insulated crimps, it has flat dies that won't damage the heat shrink. In reality, normal crimping pliers will work fine.