This is a very effective armor penatration build which includes high crit and attack speed.

For my spell i chose ghost and heal. ghost is very effective for ganking and to quickly get out of spicky situations. i chose ghost over flash or exhaust because tryndamere can get through walls making flash pointless, and can jump ahead of enemys when needed, using spinning slash. heal is also very effective when using tryndamere because after your undying rage runs out, heal can be a very effective backup.

For my item build i combine attack speed with armor penatration and crit to maximize dps on all champioins. i find this build much more effective that the duel phantom blades build because you can get most of the items before the game ends, and become OP very fast.
With SoD + IE + ghostblade you will be able to cut through any champion like they were butter.