Half of the idea behind the shield - "a magical energy field which prevents anything above certain velocity and energy treshold from passing through", as I wrote in the OP - is to force reduction of relative starship velocities in combat. Which means no relativistic planet killers, and also means that combat would be likely similar to this, as too high velocity weapons would be useless (bullets could pass, but only if slow enough, and lasers, particle beams, Cassaba howitzers and hypervelocity projectiles are right out). @The Dapper Hooligan explained it quite well. Magnetic grapnels, would they be similar to Enterprise's grapplers?
