cant you just add an extra condition?
Condition 1->on key D down
Condition 2->on Key J down
Condition 3->is player on floor
Condition 4-> is animation(running)playing
Action-> player set animation "Charge Attack"
if not that then something like
on the above Key releases set a Variable if all conditions are met...
and a new event that checks this Variable...and if true then play kick animation...
it should work