Tooltip on Summon skill shows 5% increase in stats while it gives 10%.

Also I did not find any upgrade coming from Finesse nor Intelligence which is in tooltip of summons.
Summon, intelligence and finesse doesnt up Incarnates skill damages.

Also Supercharger does not increase damage by 50%:
86-94 to 87-109
74-81 to 89-95
37-41 to 44-48

This means Summoner is weakened A LOT comparing it to fighters or archers. I have level 13 summoning and its almost as good as my lvl 3 Warfare polyknight with 17strenght. Almost cause warfare with weapon that has 10-13damage still does more damage than incarnates and totems.

Also I can stream you the comparison between stats-non stats.