Jigokudo - underestimated healer. Heal two low health ninjas and removes 2 debuffs. (Pain healer)

Gakido - more and like a poors man hanzo without poison but more clear debuff. (Pain support)

Shurado - mystery damage is on par to seal slash mystery of midnight blade. (Pain dps)

Ningendo - can fit any team (has mirror and chase repluse to knockdown). Just like madara 5 kage when chase, absorbs 20chakra per chase(skillbreak). (Pain hybrid dps/support)

Summon pain is useless. I never even use it, still at level 1 and green color. Untouched. (Useless)

Tendo - not okay right now, only for intance, ninja exam and other related. But well see if he gets better when skillbreak. (Pain mage/burst user)

Ninjas with better dps capability like jonin minato, naruto 6p and others outshined shurado , thats why he is not used very often. There are way better dps ninjas.

Most useful pain should be gakido. Seen a lot water bomb water mains with gakido. And with 80% shield mystery based on gakido resistance is very very helpful.