I don’t claim to be a Crusader expert, but i thought i’ll give a shot shareing some of my views here.
So Seeker is clunky and pretty weak over all, cool looking set with great potential, it just needs some smoothness and power. Oh and better item management.
Well the base of my idea comes from this sesons theme, and combinening to powers, the blessed hammer and the hota powers to be exact. Now bare with me.
Blessed Hammer gains the effect of all runes except Dominion. You throw hammers in a straight line in all directions (i dont know if this should be 16 or 32 direction) dealing xx% increased damage in a 25 yard radius, when the hammers travel back they deal 50% less dmg and upon reaching the character a huge exploison of holy power occures dealing even more dmg.
Because this power alters the base skill too much i think it could be one of the set bonuses. And i’m not shure if Falling Sword synergy should stay, but if the 3 plulse dmg is considered seperatly the CD could be lowered so much, you could be jumping with FS constantly.
But we can also scrap FS completely, and i think Consecration would be a good synergy here, maybe even the DR bonus on the set too. And dealing dmg with BH could decreas the CD of Consecration.
Currently there ara too many items that can be used with the set, and there are some realy unnecesary ones too. Why do we need a hammer, two 1H flails, a shield, pants and two 2H swords for one set? At this point i don’t realy know what a good solution would be, since if we scrap the FS synergy than atleast one of the 2H swords should be reworked to a Consecration power (for example: Consec now followes the player). If it stays than we still dont need two FS powers. Not to mention the hammer and one of the 1H flails are never used.
All that is left are the DR option for the build, mobility( if FS stays as synergy, faster falling after jumping up?), and the multipliers to be figured out.
Yeah i haven’t realy thought this through, but i realy wanted to share some things that bug me about this cool build. Please share your thoughts, and be please be gentle 
Hope some of you actually see this 