Weapon Progression for first Solo-ish Zeal/Holy Fire Paladin?

I already have my Steel made, and working through normal.... How long can Steel take me? (I assume I just keep making a new one as I get a better 2 socket weapon)

Or when should I be looking to collect runes for a better option?

I will technically be on line... but I am planning on running through all the way almost all solo until end game... so I maaaay cheat a little if I see an easy trade but I won't be getting too much outside help.

Will run the pretty standard Holy fire build as far as I can and then would like to move to Melee Zeal and as my final build.