180-200 km rides on Liquid / semi-liquid nutrition only

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Hello,
Trying to figure what Is the best nutrition for me in long rides I've been trying both solid and liquid nutrition rotationally..
I would like to learn from other's experience, anybody's completing long rides on liquids (Or Thick Gel) only with no stomach (or other !) incidents ?
I'm fixing a very thick gel from maltodextrin (DE 18 – approx 300 gr Malto on each 100 ml water (!!!) - this can only be used by squeezing little plastic bags - and would of course not work with those Hammer / Power.B bottles)

Should such thick Gel work better (in terms of avoiding stomach problems) then regular 'more liquid' gel ?

Also, due to the immediate supply of energy, at later stages when earlier taken low-glycemic intakes are 'done' - one has to be very careful not to miss taking the gels right-in-time (or brfore) in order to to get bonk.. ?

Thanks!