he is amazing, mystery isnt prompt but cant be interrupted. and if the golem dies the mystery will bring it back
highest stats are life and resistance, golem gets life = to him, plus shields are based on his resistance.
shield earth and fire and the shields will go to other team members (ranked, team instance, GNW) as well if you dont fullfill the 6 ninjas he can shield in your team untill it actually shields the 6.
puts 2 shields every round.
golem cant be comboed and is immune to all debuffs, so with luck the mirror from opponent will reflect to him and do nothing.

his damage is low, but he is a tank so who cares, you have other ninjas to do the job.

i really dont see any negative points with him, very complete ninja that works well with others, even if you dont have him on your main team, i bet you can find him a place in one of the ranked teams.

depends on how you use him, i go like this

FMain - Ninja1 - FM clone
Akatsuchi - Ninja2 - Golem

That way combo starters are on move 1 and 2 and protected by clone and golem.

in your case Tobi would be move 1 and Shurado would be move 2 i guess

this way it will take a long time for them to even reach him and they will be wasting mysteries if they target him because his life can survive 2 combos, depending on power difference.

but i would replace Shurado with Ningendo if you have Rhino summon for interrupt mid combo with chaos, altough that is just a preference i have since i fight people way stronger then me and interrupting really reduces the damage i take and gives me a chance at a win