Ghost can transform himself to a spiked ball or spear, or Erik can transform himself into water and freeze himself into an icicle and I could throw them through Tobi’s warp at someone. Though that puts either of you in close proximity to a threat.
Alternately, with knock-back, i can conceivably kick someone several meters back into a warp maybe over a cliff, or into the sky somewhere for a dramatic, crator-ish re-entry into battle. And maybe a well timed kick from Kami on his way down. hopefully through another building