i keep trying to use him more cuz i have him 4* but havent rly found a place for him yet ... i feel he's kind of hard to work with. yet he is rly strong in theory ... i always have a hard time against water mains w him cuz they can heal his squish + water enhance. i've heard af/kisame 2 shark bombs for kyuubi is solid approach.

When I switching my main ,I mostly choose water main and when I need team dealing a lot of DMG Kisame is perfect. Yeah its true that he need time (or just chakra) to be trustworthy in his Sword attacks but even beside that 2rounds of Kisame and Main Shark Bomb Jutsu cooldown means U can bomb enemy without any break ,I used him with Tsunade and Hidan (quick healing x3,main neurotoxine can cause stun,tsunade can initiate chaos,kisame acupuncture and stealing chakra) and was pretty effective if didnt fight against some op "pay for win" team. So he is one of my favourite sword users ,and useful ninja

But what use is his stealing chakra if the enemy will use it, then gain it back next round. It would be different if the Justus didn't immediately take the chakra. Though, Kisame is a good counter to avoid Breeze Dancer-Itachi teams from going full-on nuke on your team. But no good since opponent will use all chakra available before you use Kisame's mystery. Again, if the Justus didn't automatically take the chakra, Kisame's mystery would be more effective.

he is realy strong

It's subjective. Yes, your opponent is likely to select all jutsu in that situation and queue them up straight away to avoid losing the chakra, but that allows you to utilise your own sealing and other chase-combo preventers like immobilise and paralysis to stymie that attack.

Wind Main prefers to actually hold back a little in the itachi-barrier to ensure it can wipe any detrimental rebuffs off of its team first, which may mean there is a pause in queuing up mysteries. This can be exploited by Kisame and other chakra drains like Shino, so means they have to risk not having their combo go off properly in order to hit with the mysteries (which then means they are cooling down as well)

And A Team That Fits With Kisame Hoshikaki is Fire Main Kisame Of Course Kakazu/Lee 4* And Ukon Sakon

Why not pair him with Mabui, he'd get a shield at start and as long as he attacks after her your charka will be at least 40 points guaranteeing his passive will have some effect. plus she can heal him if necessary.

He is strong, you just need to make sure to avoid using him when enemy team has too many ninjas can cause Ignition or stealing chakra