If you have already got Preston in them sizes why bother getting hydro…….to a degree its personal opinion but here goes with what works for me assuming you essentially do commercials as you say: –
2 x Midi – 3/4 doubled up for silvers and winter
2 x Middy 6-10 for winter commercials and F1’s
2 x Preston 11h or white hydro – general summer / heavy winter
2 x Grey hydro (for some reason I can’t get on with the 13h perished too quick!!)
2 x Black hydro or Preston 15h – stepped up general use
2 x Red hydro or 17/19h – for lump fishing
The only others I occassionally use are solid latex 14 or 16 set tight when I want limited stretch ie near snags etc
Before you say thats 12 not 10 I’d either buy two more kits or drop top / bottom depending on the time of year.
Oh I’d also flog/swap 3 power tops and replace with match tops they are better and with no1 removed will do everything (I use PT3 for red hydro but know others who use MT3’s)
Theres loads of good elastic out there so when you find some you like double up and settle on a few rather than having 10 different ones!!!