Galio broken?

Well i faced galio today with lux ( counter to lux obv) and team got rekt I think galios W and ult needs nerfs/rework/minirework Some math: Lvl 18 stats fullbuild Hp:2000hp+500 rod of ages Mr: 50+25 mr boots+25 unholy grail+50 abyssal+runes%masteries=150-180+W 90 Armor: 86+50 zhonyas=130+90 from W Ap Passive: 75~ Roa: 120 Zhonyaa: 100 Abyssal: 70 Unholy grail:60 Rabadons: 120+ passive 550x35%=700-800 ap Well then Q and e are basic pokes. They got decent range and deal decent dmg W is first broken thing. 85+30% ap from dmg trigger that reduces with 20% from every trigger. 30% of 800 is 270~ 85+270:5 after every hit is 350/270/200... And 90 armor/mr also Potential 800hp heal from those alone then ult: 2 sec cc taunt (50% dmg reductioon) +400 base dmg+60% of ap ( 800 ) =900 what can be multiplied with 80% if u get 8 aa's from enemy ( needs 3-4 guys in ur ult ) 900+720=1620 magic dmg-mr ur enemy got. Its devastating amount of dmg and probably chances outcome of teamfight Also his wr in 50-53 according to lolking what is pretty high. ( ranked ) Its hard to get good ult but flashing to middle is not that hard with bit luck and timing. but there is one problem and its low playrate that will go even worse if nerfed, but i think if u would rework W and mini rework ult it would get better. W would be some defensive/utility ability and ult should get cast time similar to darius q so u can dash/flash out from it.