Riftblade does ok damage but definitely not great. It needs to be brought up on par with Champ for pvp as its main function is pvp (or so the video said). It should be a good ranged option as well.
Increase the damage increase from AP across the board so that RB is on par with a similarly geared Champ.
Remove Rift Storm and add a 3rd spear at that point. Burning Spear - applies a lingering wounds type effect to target. The 3rd spear would increase our number of ranged attacks and apply an important debuff and allow RB to be a great soul to couple with tank souls for pvp.
Drop the cooldown on Flamespear to 2 seconds.
Bookmarks