I have a Stihl H100-2 pole saw and I was, too, initially quite unimpressed with the speed at which branches were cut! Hey -- my arms DO get tired holding it with them often outstretched to max to sever that branch! I, also, had thought of a more/aggressive/quicker cutting chain, but scratched that idea when I gave thought to the "wussy" powerhead on this saw. Only a 12" chain -- if kept sharp, my chains cut "OK" for me. Rather than seek/purchase a different chain, my remedy was to purchase two more OEM/stock chains: the STIHL 61PMMC3-44 Oilomatic Picco Micro Mini Comfort 12-Inch Saw Chain, 3/8-Inch Pitch, .043-Inch Gauge, 44 Drive Lengths. It is not a challenge -- and it provides those arms a break to stop and put a new chain on when cutting becomes slow. (To be sharpened later) Another "issue" not mentioned here is how the powerhead (at least on mine) sooo gets filled with sawdust -- a good time to brush all out as well as fill bar oil reservoir.
Works for me...
geo
