Server Name: Telsiai
Team Name: nxLynz
first, lets start with incomplete tooltip, that you will notice when you casted stake it will gone faster than usual 15s, if anyone wondering why, because there is hit limit.
below is an image comparing itos stake in-game tooltip and ktos tos.neet database tooltip.
as for hitcount limit i do believe 15x means 15 mobs, sfr% x 3 is still counted as 1.
(it may or not affected by AAR, but i do believe that skill with hit count limit doesnt affected by AAR, for e.g volley fire, pheasant, etc)
but what im trying to stress here is there is a possible visual bug happening with stake
as you can see from my clip above, you will notice that 1st stake will gone after it reach its hit count limit and 2nd overheat stake will gone instantly once it hit a group of mob, but you will notice that there is still 3 damage line applied to the mob even without any stake on sight.
i hope this clip is good enough for the bug proofing.