On the flop and turn in every hand you have to have a raise range with both very strong hands and bluffs that have equity. I think on the flop you are too deep to check-raise. If the chips go in, you are committed, but always behind. It is not a good spot. A better hand to choose would be 98 without a flush draw, for example. Where you could still fold to a reshove.

Now on the turn you can shove 33 and JT for value, that is it really. These hand are in my opinion even very unlikely, since they would generally raise the flop on such a wet board. My point is, if you raise on this turn, you don't have much value, so you should be very selective with your bluffs.

I personally think 9s8s is a perfect hand to bluff with in this spot as a bluff, because the hand plays really well this way. When called against a set or one/two pair, you still have equity. But the most important part is you fold out hands that have you completely crushed like suited aces, kings, or queens with spades. Or perhaps UTG was trapping pre-flop with ace king. Your opponents simply have to fold these draws since they are not getting the right odds. If you'd just call you might get into trouble and run into a bigger flush or straight when you hit. Also, 98 does not block some weak hands your opponents might have that have to fold to a jam: AT, KT, QT, KQ, As5s etc.

Wheter you should raise or jam. You should probably jam in this spot. To make sure your opponents are folding their draws. And to get value with your good hands/not let them see a cheap river with their possible draws. Besides, your opponents' ranges are very wide and weak. If they don't realise this you can get away with overbluffing. Let's put them in a tough spot with a little too many bluffs!

On the flop and turn in every hand you have to have a raise range with both very strong hands and bluffs that have equity. I think on the flop you are too deep to check-raise. If the chips go in, you are committed, but always behind. It is not a good spot. A better hand to choose would be 98 without a flush draw, for example. Where you could still fold to a reshove.

Now on the turn you can shove 33 and JT for value, that is it really. These hand are in my opinion even very unlikely, since they would generally raise the flop on such a wet board. My point is, if you raise on this turn, you don't have much value, so you should be very selective with your bluffs.

I personally think 9s8s is a perfect hand to bluff with in this spot as a bluff, because the hand plays really well this way. When called against a set or one/two pair, you still have equity. But the most important part is you fold out hands that have you completely crushed like suited aces, kings, or queens with spades. Or perhaps UTG was trapping pre-flop with ace king. Your opponents simply have to fold these draws since they are not getting the right odds. If you'd just call you might get into trouble and run into a bigger flush or straight when you hit. Also, 98 does not block some weak hands your opponents might have that have to fold to a jam: AT, KT, QT, KQ, As5s etc.

Now whether you should raise or jam. You should probably jam in this spot. To make sure your opponents are folding their draws. And to get value with your good hands/not let them see a cheap river with their possible draws. Besides, your opponents' ranges are very wide and weak. If they don't realise this you can get away with overbluffing. Let's put them in a tough spot with a little too many bluffs!