Ramming is as effective as scraping your fighters. Its better to design specific types of fighters for specific task such as Rockets, Bombs, and Beams. I use a strong combination of these, and have seldom been forced to RAM anything with anything. All ramming seems to do for me is put me down by one ship.
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"We've made too many compromises already, too many retreats! They invade our space and we fall back -- they assimilate entire worlds and we fall back! Not again! The line must be drawn here -- this far, no further! And I will make them pay for what they've done!" -- Patric Stewart as Captain Picard
UCP/TCO Ship Yards