With Tryndamere i find it easy to harrass people more and then kill them later, during the start you want to bait the opposing enemy to get into they're bush at top or bottom so i use Heal and blood lust to make sure i can get away.

You mainly want your life steal first because it will be the most useful and easiest to get then you gradually build into your crits and attack speed, because of Tryndamere's blood lust you will not need to get the last 20% of crit so you can focus a bit more on attack and attack speed.

With this build you need to farm a lot so i suggest that once you hit level 8 you roam arround jungling and laning getting rid of minions with your crits and spinning slash this will help you level up and also get you kills hopefully.

Once you have completed this build you can reach up to 600 attack just because of blood lust and you take one third of that back life steal. You will easily take on the whole team with 3 others; you taking on 2 and finishing off stragglers. I hope you enjoy this build as much as i did because i found this build really amazing from the shear force. Basically by the end of this build you'd be more of a tank and assassin just because of your life steal and attack speed with your crits. :D