Yeah I mean jumping into enemy troops in general with back up, it will still kill Rufio in a matter of second because with the current stun range it won't affect troop that much and you have way more skill that is more useful that can be used before Rufio leap like blizzard, summon *troop, blessing of sun god, soulless scourge. he needs to have a big impact when using his skill or no one will even use his skill and if the battle drag to the point where you can use Rufio current skill then you pretty much already almost achieve victory.
Having an edge in PvE is not useful at all, in a PvP oriented game with siege and stuff, why you need to use Rufio if you can use Avalon with 3 gold squad to clean PvE faster and easier without casualties? even Avril did a better job when fighting tons of undead squad with her blizzard, and she still provides utility in PvP. Tanking? you can use virion with light safeguard better when fighting above silver V PvE content as a tank than Rufio.
There is no reason you need to use Rufio in any content besides providing 2 slots for a squad and stat buff.