Hi

Masteries

3/3 Tenacious is very good idea for ali, specially with Mercury's Treads (50% tenacity)

1/1 Safeguard give you chance to play little more agressive and dive on second lvl

2/2 Relentless and 3/3 Wanderer with Mobility Boots and 3x Greater Quintessence of Movement Speed will give you INSANE SPEED

2/2 Tough Skin and 1/1 Bladed Armor will give you easier way to clean jungle

1/1 Veteran's Scars with 1/3 Juggernaut will give you early sustain. Your early sustain with Safeguard will give you chance to easily dive

Runes

For first build:

Runes

Precision

Fleet Footwork

Phase Rush

For second build:

Runes

Precision

Fleet Footwork

Phase Rush

Summoner Spells [Ghost or Flash]?

I think Ghost is better spell for Alistar in jungle than Flash. Ghost with this build masteries have only 189 s cd ( Flash have 270). Ghostgive you 8 seconds 35% speed bost so it's amazing speed up (insane if you have 3x Greater Quintessence of Movement Speed and Mobility Boots). Ghost give you high speed to fast go to your mates and help/save them. With Ghost almost all your ganks will be succesful. Of course with high speed you can initiate teamfight by using fast combo (W+Q) to focus their adc or apc.

Flash is good spell for Alistar, not best but good. With Flash you can easily teleport behind any wall on map(but you don't need it because your sustain and Unbreakable Will makes you unkillable) or fast Flash to enemy adc use Q and kick him fast by using W to your team.

Ghost is good for ganking and helping your mates, and nice spell to run.

Flash is good for team fights, you can easy use Flash Q and W to kick their adc or apc to your team

Creeping / Jungling

Alistar jungle cleaning is 6.5/10 when i do one of these options i always gank on 2 lvl when they have 1 so i almost always get kill;>

Normal Jungling(safe)

You pick E as second skill if you do normal jungle. #1 Start on ancient golem 2# next go on wolfs. #3 After you clean wolfs you can go wraiths or gank mid(prefer ganking mid) #3 after cleaning wraiths #4 go clean golems #5 and lizard elder after this #6 gank bot or #3 after gank mid and #4 go to their wraiths and leave 1 small creep and go #5 to their lizard elder(if there is red take it and leave 1 small creep) 65 After taking red go to golems and leave small one after taking big(you can do this earlier if there wasn't red) #7 after this gank top.

Farming

Start farming by using Q, when passive of Q will disappear use E for heal and next passive. Farming with ali is very easy. Remember never use W in farming (waste of mana, and you can kick creep outside spawn and you will waste time too

Team Work

Alistar is tanky champion with lots of sustain. He is the main protector of the team. When they focus your ad carry or ap carry(mid) you can use W to kick him outside or use Q to give your ally little time to fall back.

Alistar in late game ( with maxed E) and some ap with cd reduction have pretty nice heal to help his team

On alistar you dont buy ap or ad items. You have only tank runes and you buy only armor/resist/sustain items. Your role in team is tank all damage and help you mates in trouble by using (Q or W) someties E will save someone too (your mate have 150hp and he have ignite) your E can easy save him, so alistar is great jungler tank with a touch of support:>

Summary

I wanna thanks to jhoijhoi for great guide (this guide help me a lot in making my alistar guide.