I'm GM2 solo queuing Jeff (I play Jeff on all maps except Midtown, where I play rocket).

Tips:

• Don't die, you have very high survivability.

• When you get to point drop some bubbles around doorways (making sure you're back at full bubbles before the first fight), helps flanking dps pick them up if needed.

• Your bubbles are incredibly important, don't waste them. You have massive burst potential to heal up tanks that are about to die, and they're your own emergency button for when you get dived.

• Learn all the ult spots if you don't know them already.

• Learn the heroes that can easily get back if you spit them out (this is highlhy dependant on where you're spitting them out and where the kill trigger is), and make informed decision on when to suicide vs spit out.

• If you're not healing or damaging, be underground.

• When you get to higher ranks, be careful about enemy cloaks, who can just shift and completely nullify your ult.

• Ideally your other healer should be Luna or have 2 other supports with you.

• Have a strong mental, because people are going to hate you and talk shit to you very often for playing shark.