Assuming you talk about ranked play.
If an ally dies too much, it’s their fault but they’ll blame you. Ignore that.
Jo has great wave clear, that makes her more valuable in 3 lane maps. You should take advantage of that double soaking if possible.
Jo is not a one build hero. You must know your talent choices and pick accordingly.
Jo is a wall tank, not a dive tank. You either peel, wall or engage. You almost never dive. Jo becomes a diver with falling sword, hoping to get to have the lvl 20 upgrade.
Never dive enemy to annoy dps. It’s not what tanks do. If you pick tank play tank. Peel/Wall/Engage.
Leave the diving part to bruisers and melee assassins that will die then blame you.
You mostly wait for an opponent to make a mistake and you CC them, W+Q then maybe R.
Your E is for wave clear or to prevent ranged aa dmg. Don’t randomly E opponent just cause it’s off CD.
Team compositions determines your behavior, if your team pokes a lot you have to be passive, if your team is made of divers you dive. If opponents poke try to engage, if opponents dive be passive and peel.
I usually pick blessed shield and you should really engage(not dive) a TF only when that is available. At level 20 BS stuns all enemy team for 2 seconds, can be game ending.
lvl1 hold your ground. almost always
4sins+7momentum+13hammer+16holy+20blinded.
Standard E build. amazing wave clear, scouting(hammers), peeling.
lvl 4 eternal retaliation
is good on maps with prolonged fights with multiple targets. allow to W over and over again. Shrines, Alterac are good examples.
lvl 7 subdue + lvl 13 roar + lvl 16 fanaticism
This is a very strong combo if you want to engage hard. 2 seconds 80% slow is just like a 2 second root. fanaticism makes your escape easier of your engages go wrong.
lvl 13 Holy Fury
great vs zagara, useless vs anyone else.
lvl 20
BS upgrade is amazing.
Blinded by the light - 25% hp rune to team is also amazing.
Using it on engage it’s likely you will have it off CD again before the end of the TF.
You can prevent many kills with this.
Most importantly, Never dive enemy to annoy dps.