Of course it all depends on how the game goes, but Void doesn't start to 1v5 the enemy team until 40 minutes plus and only then if he has been farming well and hasn't gotten ganked to pieces.If you've been fed dozens of kills before the 30 minute mark however, then you should be able to. Firstly, you shouldn't go a rigid build with a Tinker. Do you want to push as early as possible, max March first, do you want to be an extremely scary ganking presence on a global scale in early-midgame, max rockets and lasers first.Depends on the enemy line-up, your line-up and what you feel will be needed, to be fair.And finally, an "Ultimate" or "Ulti" is the last ability on a heroes action bar. It is an ability that can only be ranked up 3 times (Unlike the others that can go up 4 times) and will first become available at level 6, unlike the other spells, that are available from level 1. Ultimates are powerful spells that really define the hero and are all unique from eachother.In Tinker's case, that would be "Rearm".