No assassin should have true damage or attack speed immunity in their kit. Riot has no clue how to design and balance assassins, it gets more obvious every single day. I was looking at that build to judge the true damage, but you know what would be worse than that?
- No reason to build armor pen since true damage isn't physical. This combination would do far more damage to high health champions, combining BOTRK + Bloodrazor's 4% max health on-hit and rageblade's double on-hit with infinity edge (10% of damage as crit) plus Conqueror rune (AD boost, true damage) - Now, as far as the numbers?
- With Bloodline you gain 8% lifesteal over the game, combine that with BOTRK and you end up with 20% lifesteal overall. That's equal to a Bloodthirster.
- Attack speed: 40% + 25% (and when stacked, 48% on rageblade) + 45% + 50% + precision bonus and ult = 2.5
- On-hit damage would include true damage as well as 5 + 10% bonus ad + 5 + 10% bonus AP + 8% current health + 4% max health and adds 12% less damage from the victim due to PD passive, which also enhances his already unable to be slowed movement speed.
- Crits equal 10% crit damage converted to true damage added to the basic attacks
- AD amount would be around ~250 plus the E bonus plus Rageblade bonus plus Conqueror bonus, so you'd hit for this every 2.5 seconds
So with elixir and conqueror's bonus AD, you're basically dead within two seconds. Armor means nothing, the more health you build the quicker he'll cut through it, and you can't slow him or his attack speed. A 4,000 health champion takes 160 damage off Bloodrazor per hit, plus 8% current health (320 on 4,000) and then you also remember conqueror switches 20% of your damage to true and adds up to 35 AD bonus. So Rammus, Malphite, anybody really would die quickly and stuns usually last a grand total of 1-1.5 seconds - his ult lasts 7 and adds 7 every kill/assist. To stop his ult, you'd need a Malphite ult (1.5)+ Rammus taunt(2.25 max rank) + Xerath(2 max) or Veigar (2.5)stun + another stun every time he ults.
The attack speed immunity is one thing that needs to go. Then, add the ridiculous unmitigated true damage to that and you'll be all set.
This is why true damage is bad, kids.