first off this build is a complex type of build which requires good positioning while being able to dish out damage why positioning?
The entire build is made to do almost everything you need AOE stun invincibility to damage and basic attack slow enemies while having your nova on very fast movement speed for chase and flee.
which is why this is the bane of almost all Carries besides mages.
You must certainly have the advantage of 1 hitting and since the build does not talk about a quelling blade or battlefury (ofcourse hes ranged) you have to stick with the old tactics called poking which rely heavy on your sage mask mana. Your 1st skill deals decent damage on lvl 1 and picks up even high dmg on lvl 4. This build isnt best when fight between levels is on the enemies advantage
-Best when there is alot of click carries like Sniper Phantom Assassin Phantom Lancer Ursa CK and etc.
-Has a massive chance for comeback due to the power hop between each level
-1v1 Duelist matching Tinker Kunkka and LC herself
-Has Evasive and defensive manuevers stopping crippling silences and predictable stuns
-Very Prone to mage due to having ghost scepter.
-Long debuffs to speed makes him a good target.
-Long and instant disables stop you from evasion on all damage and basic attacks.
-Squishy early game enemy.
The team must be consist of good communication have 1st and 2nd layer of stuns like the master of all disables Shadow Shaman
Players who give leshrac mana are his bestfriends e.g Crystal Maiden and KOTL
Combos like the vaccuum split earth requires good communication to execute
other combos like Pugna's Decrepify is an easy but deadly tactic to use against high reduction enemies like Tide Hunter or Ursa
Your main buddies on teamfights and 1 vs 3 (litteraly against anyone except mages)
or 1 vs 1 is the Euls and Ghost Scepter giving you invincibility to all damage for 2.5 seconds and invincibility to basic attacks only for 5 seconds making him counters for click heroes.
his Aghanims is the deadliest weapon there is for chase and fleeing including positioning alhough single target combined with 3rd skill it can be deadly in team fights
this also gives way for extra stuns with 1st skill and for your high movement speed you are untouchable by anyone.
Octarine is for enemies who are in groups like Phantom Lancer Meepo NP and players who does combo's with other heroes more often
Tome of Knowledge is your best friend in times of disadvantage in levels but you can also use it to keep your lead in levels.
BKB is for mages you dont want messing around with you.
Bloodstone Use it for times that you cannot allow enemies to level up.
Your Boots of travel is for pushing but also its useful for team fights and escapes due to the 100 movement speed addition paired with the talent speed and the euls speed.