Also, use legendary mods (Destiny)

by Xenos , Shores of Time, Sunday, September 10, 2017, 11:11 (2480 days ago) @ Kahzgul

If you have a legendary mod, use it! They typically give 5 power level to the item you're using, meaning not only will it increase the item power level when you install it but if you infuse it with an item that has a power level of 270 it could potential infuse it up to 275!

Do note though, infusion is not always 1 to 1, if you're infusing a 210 with a 270 it will most likely not infuse all the way to 270, though I'm not sure on all the details. It does appear to be more generous than when they first introduced item infusion though.