A crimp works in cable/wire rope, however it is not a great idea for line and would have the highest failure rate. A knot would be more preferable, though they claim a knot lowers the breaking strength of the line. (Interesting, since every line that I've seen part has not been the knot, though admittedly nearby). Splicing would be the most preferred method.
Get a good marlin spike/rigging knife and a set of Fids. A 5 piece Fid set would be good. A good splicing book is handy, though there are lots of good posts on you tube as well.