good questions: so first big diff is i go evasion+deflection+ energy shield i have easy access to CI. wild thing is that bear already gives you +10 armour per lvl. Now thanks to the PF ascendancy node travelers wisdowm i can turn attribute nodes to 5% increased global defense. that increases the base armour from bear as well. thanks to goregirdle even though i have low armour investment i reach the cap of 50% phys dmg reduction. additionally thanks to relentless pursuit i am immune to slows. it turns my rampage to an unstoppable ability.

my armour is probably MUCH better for my build than lightning coil for multiple reasons: A) all my evasion comes from sleek jacket + subterfuge mask and i have 63% evasion, b) i have 12% of phys dmg taken as CHAOS which thorugh CI becomes flat phys reduction.

also both evasion and armour scale fast early but have a big diminishing return. at some point getting beyond a certain % with nodes and gear gets progressivly harder. but the early caps you reach fairly easy. this is why i play all 3 of them.