The best way to use Morphtronic Magnen Bar is in combination with two Morphtronic Radion. Morphtronic Radion adds 800atk to every face-up Morphtronic monster. Radion's own atk is 1000 (with his own effect 1800) in combination with the other Radion each Radion has an atk of 2600, Magnene Bar has an atk of 1700.
The effect of Magnen Bar gives him a total atk of 6900 atk!!