This has bothered me since launch and I thought I would finally post about since nothing has been done about it yet.
First some math
Penthesilea damage is by default 260/260AP every fourth second. The first lvl gives pen 260/338AP. 5 attacks per 20 secs gives 1300 normal 1690 AP damage in 20secs.
With the 2nd lvl you get 260/416AP but only attack every fifth second instead every fourth so 4 attcks gives per 20 secs 1040 normal damage 1664 AP damage.
These calculation were made additive percentage increase if the hero has higher % part AP damage the 2nd lvl is less bad but still a downgrade.
Against a 100 armour opponent best case scenario for the skill the damage over 20 seconds with first lvl
100 armour reduce average 75% of normal damage 100*(0.5-1)=average 75 reduction:
1040*0.25 + 1664 =1924
With just the first lvl:
1300*0.25 + 1690 = 2015 so you do around 5% more damage without heavy weapon lvl2 than with it vs 100 armour.
And vs lower armour values it gets much worse.
(Sure you get a little more damage in first hit but the faster attack spped cacthes up quickly)
Please fix this asap. Maybe make lvl 1 a bit worse and lvl 2 not a penalty. Also the skill is a bit confusing (see other threads).
Thank you very much:).
Hippolytas warhorse skill seems to cut her missle damage over time in half for 30 extra range and probably more armor-piercing damage. I was not able to hover over her damage so take this with grain of salt but the damage over time change seems a bit too much. But for all I know maybe she has much higher accuracy and almost 100% armor-piercing damage.