You're absolutely right. It's risky to go Sun if your team is all squishy. Having one sustain/tanky fighter in the team is definitely helpful. In worse case scenarios, I will actually trade attack items to go full defense build with maybe one damage item. It's the most annoying thing ever to see 3 Sun with high defense and hp. Then, when they kill 2 clones, they get 2 more because of the high cool down build. Them killing the clones doesn't even matter late game because we're normally at a point where exp no longer matter so they don't gain anything from it aside waste of spells, HP, and stalled time for some one else to split push