I haven't used an actual Blinky, but the CommonSenseRC balancer is VERY close. Operation is simple; just hook it up to the balance connector.
Lipos should NEVER get hot when charging even at the full 1C, so you could charge at 1.9A and still have a cool pack. If you use a temp probe, it might false trip simply with changes in ambient air temperatures. No need for it IMO. As long as the pack is healthy and in balance by the end of the charge, there will be no heat buildup.
Yes, an 8000mAh battery can be charged at 8A with no adverse effects. You could charge at lower rates but that will only make charging take longer. The only reasons to charge lower than 1C are A) you are in no hurry and don't mind wasting time.

and B) if the pack is quite a bit out of balance. A slower rate will ensure the balancer has a chance to fully balance before the end of charge.