Thatās because IMC balancing sucks and Doppel Shinobi is just broken.
IMO IMC got to decide, either make a Class use a strong weapon (twohanded) but then only give moderate skill attack, or use a onehanded weapon but then get high skill% to counterbalance.
Powercreep is especially a result of IMC being blind with their solutions of buffing/debuffing.
Btw, Doppelsoeldner was a support mercenary job, his job in historical times was to create an opening in enemy formations so that cavalry and infantry could break through the wall of lances, not to mow down enemies.
IMC wouldāve done better to create that Class more accurate as a debuffer that focus on destroying the enemies defence&interrupting it instead of making it the usual no-brainer MMORPG Class that wields a huge sword as if itās made out of paper mache.
But, you have to accept that not everyone likes Doppel & twohanded swords.
Itās very limited, and Shinobi is another lazy Class design with skills that donāt really matter aside of Bunshin no Jutsu (people only get the Class only for Bunshin, which is just stupid because the skill is still broken even after adjusting it).
Retiarius has a better overall design, sure, it got less damage output because it doesnāt have 8 damage skills, but at least itās more interactive and gives offensive and defensive options aside attacking, which make it way better balanced than building some Dragoon/Lancer/Doppelsoeldner/Fencer, which is one of the biggest reasons I like the Class.
It turns the rather static combat in TOS into something dynamic on the player side.
Who knows, maybe IMC will give us some attribute like Hangmans Knot attribute that reduces the AoE Defence ration inside the net to 1 with C3? As the new Classes are already fully conceptualized, I guess thatās a thing to find out at Rank 10.
Also, given that Retiarius is pretty strong already, it might be too overpowered to give that attribute to just Retiarius C1/C2, because while they are using the net quite effectively, theyāre not masters at net-throwing yet;
Imagine if Ret1/2 had that at GvG, I guess people would just instantly die to a semi-well invested Retiarius [Shield Divest>Net(0 evasion)>Trident Finish for 2x damage&50% base crit chance].
Also, itās not as bad as you might think, Swordsman already starts with 4 SR(ingame term for AoE Attack Ratio).
If you use full Solmiki Leather set, you get +2 SR, you can also use an AoE Alchemist Potion to get another +3 SR. With 9 SR you can already hit up to 5 medium sized monsters.
If you really want to hit the full 8 medium-sized targets, you need three 10-star Centaurus cards (+6 SR in total).
All in all itās achievable if you want to invest into your character.
You could exchange some gear for additional AoE attack ratio, but currently aiming for Solmiki Leather should be one of the top priorities for physical attackers (plate is also an option but has less crit boost) and pretty ācheapā considering that you can collect the whole set a lot easier soon (transcendent equipment being tradeable through storage+halved transcendence costs) and casually on the side[the longer you wait, the less you have to pay for rerolling cubes; you need an average of about 18 cubes (9 weeks) to get an item without spending silver on rerolling].