Why not take another look into the crit+AD items
For a while we have had marksman that have crit synergy with their spells and generally get one of the zeal items only to round out their crit chance beyond IE+ER and it gives them a cheaper crit spike. Maybe a 3000gold+ modified version of lightbringer that builds off of BF sword. It would offer a third AD+crit item in a similar way that there are at least 3 types of almost every other item type and with another strong passive it offers the chance to lower some of the base stats and in parallel the price of all crit+AD items. Also for IE the passive could be changed to interact with to increase damage in a similar way that jhin. The effect would be much more appreciated earlier in the sense that it is much less tied to the rng of crit.
and gives a Bleed effect OnCrit along with a (crit%) chance to inflict that bleed on any damage you deal. If memory serves, Pillager inflicted a magic damage dot over 3 seconds for 240% of your bonus AD.