Hidden arbitrary trip ward, stacked on top of hidden arbitrary reaper ward, stacked on top of apparently bugged fighting style tactical stat mod multiplier rules, stacked on top of hidden mob stat/tactical defense/save stat squish changes, stacked on top of epic ward, stacked on top of legendary ward, stacked on top of hidden champion wards where you just see a crown, stacked on top of raid ward, stacked on top of economic balancing at odds with D&D, with tooltips that are mostly computer extracted and generally wrong.
Tactics are too convoluted to figure out now, to the point that I don't think anyone can tell you what they are or where they are headed, or even if they are WAI. As the level cap goes up, how does gear level stack up against 6 hidden wards and a bug? You might as well shake a magic 8 ball.