Without the ability to sim, GW is simply too long to complete daily (at least, for someone like me who has a job/family). Please half the nodes, tweak the difficulty, increase the rewards.
it is designed to be difficult, yes the last node you are facing a team more powerful than you.
There are many ways through TW, specific teams (Phoenix, resistance), and other tactics (TM loading teams, retreat and replay). there is also a tim when you should just accept that you will not complete and start over.
it gets easier when you develop more and get past level 85.