hi
I play Zac very much and think i should just post what i build on him etc.
Jungle:
Buy:
Haunter's machete + 5x health potion
1st backport: Spirit of the Ancient Golem + Boots of Speed
2nd backport: Spirit visage because it gives you Health, Magic res. Sustain in the jungle (20health/5seconds) and CDR. - Boots of Mobility or Mercury's Treads
Then buy Rylai's Crystal Scepter
Warmogs / Randuins / Rabadons ( i usually don't buy it but it is fun to deal so much dmg ) / Sunfire Cape
Would be nice if someone tests it and give me a feedback
€dit: Runes:
3x Greater Quintessence of Ability Power (+4.95 AP)
9x Greater Mark of Magic Penetration (+0.87 Magic Pen.)
9x Greater Seal of Armor (+1.41 Armor)
9x Greater Glyph of Scaling Magic Resistance (+0.15 Magic res./Level)
I choose them because u need the AP for deal damage with your spells. Armor ofcourse for jungle. Magic resistance per level because u don't need magic resistance in the jungle and you level up fast. Magic penetration - yes .. because he is ap