Husqvarna chainsaw questions

Skip chain. Rakers removed. I recommend a 1/4 skip or 1/2 skip. Still has rakers, but 1/2 skip only uses half the rakers of a normal chain and 1/4 skip has 1/4 as many. A 28 is the largest bar the 528 is set up to run. Maybe go on some of the arborist forums and look around a little.