This is my first build guide, so it probably has a few flaws, comments and what not are appreciated, and the skill masteries are probably not in order, but the main thing is, to max out cleaver then masochism then burning agony last

Since for some reason my thing is lagging, I'm going to put my masteries here.
go 8 in atk, 21 in defence, and 1 in utility for the ghost mastery.

when i play, i ALWAYS get early warmogs. It really helps you last longer from harassing (if you are still in the laning phase)... but usualy I am able to get it before midgame, so around lvl 10?

heres the main items i can tell you to get (based of the opposing team)...

Thornmail this is when the opposing team is unbalanced and they have 2+ DPS champions (xin zhao, yi, ashe, etc.) THIS WILL HELP

Force of Nature If you are versing a very AP team with 2+ spell casters that deal good dmg (veigar, ezreal, anivia, etc.) I recommend getting FoN a bit earlier.

IF YOU ARE HAVING TROUBLE LANING, DONT GO FOR EARLY WARMOGS, JUST GO SPIRIT VISAGE/BOOTS/WARMOGS/etc.


if you decide to switch up your build like that make sure that the person(s) you are building against is actually getting kills, building a thornmail against a 0-3 master yi wont do much

I like Exhaust and Ghost.. but other options can be used.. i just find exhaust and ghost to be the most effective

Pros:
Decent tank
hella damage output (for a tank)
good chaser
decent farmer (burning agony)
cleaver will piss people off
great harasser

Cons:
early game is a bit squishy
skill shot cleaver, takes skill
slow early game (because getting early warmogs, but trust me its worth it)
ignite messes a mundo up
katarina/gang plank/miss fortune/etc. will mess up mundo too because of their poison-like passive

When you get into a team fight, if theres not another tank in your team, YOU HAVE TO LEAD. head straight for their squishies (or whoever is most effective). If the team you are versing is relatively smart, they wont focus you... but this could also be a problem however because mundo does really good damage. Theres been countless amounts of times where they focus my team mates instead of me, and then i survive to clean up all their mess and win the team fight for us.

When Engaging
make sure your whole team is there before you start your engagement. You dont wanna get a good push and realize that your teamates arent there to help (this happens to me sometimes).

Early Game
I believe that getting last hits are more important than harassing (unless you manage to actually get a kill). Especially with mundo's starting item in this build, its not the best item to be engaging with. I perfer to just get as many last hits as possible with your leaver/masochism. I usually play it safe now a days because of bad experiences, so if you are laning against someone with range, i advice you to just stay back and last hit with cleavers only.

SWEET! that means you get to be over leveled. YOU WANT THIS. Mundo (for me) has great survival skill for soloing. He has a really good base regen+ once he hits lvl 6 he gets his ulti.. this is pretty much equivilent to recalling (without being able to buy) and still getting exp from minions. But remember, when you are 1v2 ALWAYS stay back and just last hit with yur cleaver.
If you are able to avoid getting harassed, then this is good because that means that the opposing team wont tower dive you because a mundo with high health will be able to survive a tower dive.