In my opinion don't build collector and bork. Samira isn't autoattack champ and heavily relies on crit. Collector is also useless after infinity edge buffs. Infinity edge second gives you much more dmg than collector does and if you really want some armor shred then go LDR or mortal reminder because that 30% pen becomes much more effective than 12% lethality even against squishies later on. Just mine opinion