This is my team currently in Liquid Crystle (a crystle remake) can any one give me any ideas hows to improve what i have and what pokes to add

Bullstien the lv 26 calm Tauros
HP 80 AT 51 DEF 54 SPAT 30 SPDf 51 SPEED 64
Moves: Strength Pursuit Tailwhip (must replace with what though) Tackle (same as tailwhip.

Whiplash the lv 25 brave weepingbell
HP75 AT 55 DEF 36 SPAT 54 SPDf 31 SPEED 31
Moves Vine Whip ( giga drain when i get it ) Acid ( Sludge bomb) Wrap ( idk) Sleep powder

Nano the lv 26 docil Quagsire
HP 88 AT 54 DEF 55 SPAT 47 SPDF 44 SPEED 25
Moves: Surf Mudshot ( EQ) Slam ( Ice punch) Headbut

Burner the lvl 25 calm Quilava
HP 66 AT38 DEF36 SPAT84 SPDF49 SPEED49
Moves: Ember(flame thrower) Quickattak (idk) Smokescreen(idk) Leer(idk)