against organised and good rated teams, focus guardian or rage jugs are not good imo because the opponents will SPREAD OUT.
The smash or sweep against FULL WH players can only do a maximum damage of 6500 (highest i have seen is 5.9k for a smash, show me a pic or video if you can do more than that.) or less since no more adrenal and relic pops.
Given that focus or rage spec needs to build up focus/rage SLOWLY to execute bursting abilities, the opponents would have their health's topped up by then.
In contrast, vigilance/vegeance spec basically has unlimited focus/rage to use and keep up the constant damage on opponents.
Vig/veg spec has a much greater survivability too - 4% additional damage reduciton at all times + activating focused defense grants 15% damage reduction which acts like a mini Saber Ward.
Think in a simple way, would you want to do 15k dmg every ~12seconds with focus/rage spec (from building up focus/rage to executing your bursting abilities) or doing ~3-4k damage every second with vig/veg spec (virtually unlimited focus/rage to expense thus you can keep using attack abilities)?
Well in the end it is a personal choice, some people like focus/rage spec, some people like vig/veg spec, choose the one that suits you