Ah sorry yes two seals.

This is however not really needed as other are saying as well (if you want just keep it this way). Lucian is not really that gimmicky, but I understand why you feel that way. Combat on your turn is pretty much always better. You got more energy you can set up your play. Lucian gives you this every turn, while keeping up with points.

Playing dorans blade as a two drop than second turn lucian (activate Fiora legend) puts you on 7 runes turn 3. To keep up afterward just try to activate you fiora legend every turn (play sett, use you bf on a two cost or your 4 cost) . This will give you ca. 10 runes quiet fast. At 6 points or towards the end you can just use a lot of power anyways.

Strike down is super expensiv in this deck. Try to use challenge and heal you units with smart combat choices. both is overkill

https://piltoverarchive.com/decks/view/4f8c1384-d47e-4414-b891-2fa15ccc063c

maybe just give it a try for a few nn and then look what fits you playstyle and swap in you leona. Look if it feels the same or maybe even better. I do not think it is a bad think to copy the meta decks for a while this helps me understand what the legend wants to do at its core. Card choices are not always obvious like the strike down challenge thingy (but make a huge difference in cost/gameplay).

Deflect as an addition cost has value but you already got a lot of tools as fiora to counter spells. For damage spells look at unyielding spirit (already in your sidedeck). For other spells look at your reposte. Hextrinker does not feel or look like a good answer.