oh, look, this post again.
l2k.
I've played the melee krogan a fair bit and have played with some great krogan players, almost without exception even the best ones get sync or barely saved from being sync'd. Two things get you sync'd that is a bit beyiond your control. 1) just having a huge hit box and no mobility to are vulnerable to a sudden out of the blue sync. 2) Helpful teammates who stagger enemies as you are about to attack them leave you in sever sync jeopardy.
If you play a lone wolf style or solo you have a much better chance of not getting synced because you can dictate how the enemies come at you and when and where you attack them. If you have a clean shot you will rarely blow killing a phantom, you can also do the old ramp maneuver. In full team mode its much tougher. You either get synced or you play chicken krogan.
Your krogan will rarely get synced if you just spam inferno nades and shoot them with claymore.
I'm basing my comments on all the games I play whether I am a krogan or not. See a guy playing pure melee? Set the timer until he is in spectator mode.