Recently i have been questioning myself if Mobis are worth their gold on a support when compared to other boots. I.e. are they giving enough speed to justify giving up on extra 20 MS in combat and 10% CDR on Lucidity, extra armor on Tabis etc. Did the math, maybe someone finds this useful.

TL;DR When roaming from bot to mid Mobis will save 3 seconds (only 2 if recently out of combat) one-way when compared to traditional boots (Tabis, Mercuries, Lucidity). That equals about 15% less time traveled. When returning to lane after recall you will shave 5 seconds off 34 seconds required to travel back with Tabis. I didn't do the math, but i think Mobis don't have as much impact on the late game rally to enemy nexus since dying/recalling grants massive speed boosts for 7 seconds and you should be hitting movement speeds cap. Plus in the late game there are other speeds increasing items.

PRO's of Mobis ---200 gold cheaper than Tabis, Threads etc. (but same price as CDR boots and Swifties) ---You can expect to save 5 seconds when returning to bot lane after recall, 2-3 seconds roaming to mid one-way ---You will be moving about 15% faster compared to other boots. But only when out of combat and this bonus will relatively diminish when you buy other speed items (Dead Man's Plate, Point runner items etc.)

CON's ---slower during combat (only +25 instead +45 on other boots) ---you give up bonuses on other boots (say 10% CDR and SS reduction (worth about 400g) or +25MR/30% tenacity (worth about 600g)

CONCLUSION I'm somewhat underwhelmed and not sure if spending 20 seconds more in lane (say 4 recalls or deaths) (equals one minion wave) plus reaching mid lane 2-3 secs sooner matters enough to give up speed during combat plus ability to cast extra spells (due 10% cdr) or have extra 25-30 armor. The latter may cost my life or team-fight. The former gains me some extra xp from that extra wave and maybe some ganks will more successful due me arriving those extra 2-3 seconds sooner, but maybe that will not matter at all since i'm the one having power of surprise.

What are your thoughts?

MATH BELOW

Movement speed is a champion statistic that represents the rate at which a champion travels across a map. One movement speed point translates to one game distance unit traveled per second (as a frame of reference, Teemo Teemo's diameter is 100 units). For example, a champion with 300 movement speed will be able to walk three Teemo Teemos in one second.

Distance between mid points of bot and mid lanes: approx. 7,150 in game units. Distance between the Fountain and mid point of bot lane: approx. 12,850 in game units.

Median Champ Base Movement Speed 335 (Leona, Nami, Thresh etc.)

Scenario “No Boots” (335) Roam = 7,150 / 335 = 21.3 sec Back-to-lane 12,850 / 335 = 38,4 sec

Scenario Ninja Tabi (+45) Roam = 7,150 / 380 = 18,8 (economy of 3.5 seconds or 12% over “No Boots”) Back-to-lane = 12,850 / 380 = 33.8 sec (economy of 4.6 seconds or 12% over “No Boots”)

Scenario “Mobility Boots” (+25/+115) Assuming full buff (+115) start Roam = 7,150 / 450 = 15.9 (economy of 2.9 seconds or 15% over “Ninja Tabi”) Back-to-lane 12,850 / 450 = 28.6 sec (economy of 5.2 seconds or 15% over “Ninja Tabi”) _Assuming recent combat start (+25 for 5 sec, then +115) _ Roam = (7,150 – 360*5) / 450 + 5 = 16.9 (economy of 1.9 seconds or 10% over “Ninja Tabi”)

Scenario “Swifties” (+55) Roam = 7,150 / 390 = 18.3 (economy of 0.5 seconds over “Ninja Tabi”) Back-to-lane 12,850 / 390 = 32.9 sec (economy of 0.9 seconds over “No Boots”)