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MIG welding thin wall square tubing in a common fixed position.
MIG welding uphill requires lower settings. A pro tip is to just use the chart or auto settings for thinner metal ( 2 thicknesses usually works well).
Using a push angle vs a pull angle is an argument that shouldn't even exist, but folks continue to argue. Both work.
For spray transfer MIG, pushing is usually best. But for short circuit MIG, both pushing and pulling have their place... and that's a good thing because sometimes you don't have ...
If you're just looking to keep things simple, this one MIG technique works for all positions.
By tracing the front leading edge of the puddle, this one single MIG welding technique gets penetration in every position.