Tris lvl 13 --------------------------------------------------------------------dps(with Q)
1)2dorans, berserkers, wit's, BF----------------------267phy+65mag(371phy+89mag)
2)2dorans, berserkers, IE, ------------------------------------338phy(503phy)
3)2dorans, berserkers, BotrK,pickaxe ----------256+11,7%hp(360+16,4%hp)
4)2dorans, berserkers, SS,BF----------------------------307phy+~34mag(136)(432phy+~49mag(196))
all of the above builts cost around 5800g, wich means u will probably have about lvl 13 till u get there
dps values are with 15ad from runes and 4+0.55*lvl ad from masteries aswell as 5%as from masteries
Pros/Cons:
1) Highest magical damage, so strong if enemys have more armor than mr(after the 25-mr-shred), the 25-mr-shred also helps the rest of ur team, mr helps alot to survive vs magical damage, powerspike can be reached earlyer than with IE or BotrK, but bad scaling with other ad-itmes so get's worse from there on .
2)best singletarget dps during Q, but needs longer to reach the powerspike and is unreliabke dur to crits RNG(but also can reach much higher dps with critluck)
3) good vs high hp-targets, wich isn't that great at this stage of the game, lifesteal helps vs heavy poke, active can help to duel or kit, but overall lower dps, especially for cleanup vs lowhealth targets
4), best overall dps, especially vs multiple targets, mixed damage, scales well into late while offering an early powerspike, gp10 component, but offers no survivabillity
Conclusion:
Wit's can help ur midgame if u face alot magic damge, like a corki+leona lane, and it helps ur team to kill the focustarget with the mr shred, makes it also hard to itemize against u in the mid so wit's is the strongest midgame item here, but the bad scaling makes it an niche item, as the other paths will perform much better through the later stages of the game.
SS rush seems to be the most effecktive if u don't desperatly need the sustain from BortK, as it offers around the same dps as IE but with an early powerspike and better poke/waveclear