Yeah its pretty much unrelated to the guide.
But thinking about it now, if you just put time wave oskill on 2h barb, classic build, this should definitely be nice addition. You get massive aoe that hits for 3/2 wdm.
With poison I also found that it works wonders in teganze, since enemies there don't really move around. So you just stutter step and cast it here and there, 1 tick from timestrike kills everything. Very farmable. Ofc still less comfortable than for instance a summoner, because you still need to pay attention not to get hit, which summoner negates.