If you have it available as a bonus power, consider assigning Energy Drain to yourself in the medical bay as it can both drain geth shields and restore yours (this option should be unlocked if you talked to Tali in your cabin on your first playthrough of the game).

Squadmates with anti-shield capabilities such as Kaidan/ Ashley, EDI, and Garrus make good choices here. Regardless of whether you have Tali with you, assessing your team's reactions about geth and the ability to produce Tech Bursts often are considerations when choosing who else to bring with you. Spam Sabotage and you'll basically have a four-person squad all mission long. Since this mission is aboard a geth ship, you will only face synthetics. If you have access to them, Disruptor Ammo and Overload are also very useful. Tali has Energy Drain, which might just save your life on this mission, and Sabotage, which temporarily hacks any synthetic into fighting for your side. Tali'Zorah vas Normandy is a mandatory squadmate for this mission, unless she died in Mass Effect 2 (during the Suicide Mission or because she was never rescued from Haestrom), in which case Admiral Xen will guide you through the mission but will not be a squadmate. This mission is automatically acquired after the meeting with the quarian admiralty.

Mass effect 3 geth dreadnought