Looking to pick jenna up again ~ need jenna tips

so as the title suggest i want to start playing jenna again, tired of those "tanky blitz, thresh,leona" i used to play jenna,but slowly started to drop her, because it requires your adc to follow up and to pay attencion, and unlike leona to drop in and stun them for 10 sec enough for him to kill them etc

so im tryng to pick her up again, but im having trouble what to build, i really love the ardent caster on her ,but i feel weak if i dont get some armor -> i play a lot against graves and their bursty damadge, hence the reason i barely build it

so is jenna any good in this season of assassins, i know jenna can stop them with her q and ult, but compared to leona and those tanky supp , is jenna worth picking up again ?

also what are some good defense items on her ? to keep her alive,in all means